Jeremy buys a value pack of cheese crackers that contains
42 1/2 ounces of crackers. He divides this into servings of 1 1/4
ounces each. What is the total number of servings Jeremy can make from the value pack?
A.
81/2 servings
B.
34 servings
C.
43 3/4 servings
D.
53 servings
To find the number of servings Jeremy can make from the value pack, we need to divide the total number of ounces of crackers by the number of ounces per serving.
42 1/2 ounces ÷ 1 1/4 ounces = (42 ÷ 1 + 1/2 ÷ 1) ÷ (1 ÷ 1 + 1/4 ÷ 1) = (42 + 1/2) ÷ (1 + 1/4) = (84/2 + 1/2) ÷ (4/4 + 1/4) = 85/2 ÷ 5/4 = 85/2 × 4/5 = 340/10 = 34
So, Jeremy can make 34 servings from the value pack of cheese crackers.
The answer is therefore B. 34 servings.
A hot air balloon leaves the ground and rises to an elevation of 1,100 feet. During the next 30 minutes, it descends 500 feet, rises 950 feet, descends 375 feet, and finally passes over a school. What is the elevation of the balloon when it passes over the school?
A.
1,025 feet
B.
1,100 feet
C.
1,175 feet
D.
1,550 feet
To find the elevation of the balloon when it passes over the school, we need to subtract the total descent from the initial elevation of 1,100 feet.
Total descent = 500 feet + 375 feet = 875 feet
Initial elevation - Total descent = 1,100 feet - 875 feet = 225 feet
Next, we need to add the rise of 950 feet to the current elevation of 225 feet.
Current elevation + Rise = 225 feet + 950 feet = 1,175 feet.
Therefore, the elevation of the balloon when it passes over the school is 1,175 feet.
The answer is C. 1,175 feet.
What is the value of the expression
2/3 (-6+4)?
?
A.
0
B.-2/3
C.4/3
D.
-4/3
To solve the expression 2/3 (-6+4), we first simplify the expression in the parentheses.
-6 + 4 = -2
Now, we multiply -2 by 2/3.
(-2) * (2/3) = -4/3
Therefore, the value of the expression 2/3 (-6+4) is -4/3.
The answer is D. -4/3.
Jason is saving up for a skateboard and helmet. The skateboard is $45.50 with tax and the helmet is $18.25 with tax. He earned 1/3
of the money by mowing lawns and the rest by babysitting. How much did Jason earn babysitting?
A.
$19.13
B.
$21.25
C.
$30.33
D.
$42.50
To find out how much Jason earned babysitting, we need to subtract the amount he earned by mowing lawns from the total amount he earned.
The skateboard is $45.50 and the helmet is $18.25, so the total cost of both items is $45.50 + $18.25 = $63.75.
Jason earned 1/3 of the total money by mowing lawns, so 1/3 * $63.75 = $21.25.
Therefore, Jason earned $21.25 babysitting.
The answer is B. $21.25.
Molly's family has $3,000 set aside for an upcoming vacation. The family plans to spend
3/5
of this amount on gasoline for the drive and motel rooms along the way and
1/2 of the remainder on meals. How much does Molly's family plan to spend on meals?
A.
$600
B.
$900
C.
$1,200
D.
$1,500
To find out how much Molly's family plans to spend on meals, we first calculate the amount of money they plan to spend on gasoline and motel rooms. This is given as 3/5 of the total amount set aside for the vacation.
3/5 * $3,000 = $1,800
Now, we calculate the remainder of the money after spending on gasoline and motel rooms.
$3,000 - $1,800 = $1,200
Finally, we find 1/2 of the remainder that will be spent on meals.
1/2 * $1,200 = $600
Therefore, Molly's family plans to spend $600 on meals.
The answer is A. $600.
Rational numbers m and n are plotted on the number line below.
The number line showing numbers from -4 to 4 each divided into 4 segments has point n halfway between 0 and the first segment to the left of 0 and point m halfway between third and the fourth segment to the right of 0.
Based on the number line, which statement is true?
A.
The value of n-m is positive.
B.
The value of n+m is positive.
C.
The value of n+m is negative.
D.The value of -(n-m) is negative.
Let's analyze the given information step by step:
1. The number line is divided into 4 segments between -4 and 4, with each segment representing a distance of 1.
2. Point n is located halfway between 0 and the first segment to the left of 0. This means n is located at -1/2 on the number line.
3. Point m is located halfway between the third and fourth segments to the right of 0. This means m is located at 3 1/2 on the number line.
Now, we can determine which statement is true:
A. The value of n-m is positive:
n-m = (-1/2) - 3 1/2 = -1/2 - 7/2 = -8/2 = -4
Since -4 is negative, statement A is false.
B. The value of n+m is positive:
n+m = (-1/2) + 3 1/2 = -1/2 + 7/2 = 6/2 = 3
Since 3 is positive, statement B is true.
C. The value of n+m is negative:
As stated above, the value of n+m is 3, which is positive. Thus, statement C is false.
D. The value of -(n-m) is negative:
-(n-m) = -(-4) = 4
Since 4 is positive, statement D is false.
Based on the analysis, the only statement that is true is B. The value of n+m is positive.
A tissue in a living organism is made up of one or more
A.
types of acids, which maintain the integrity of a single cell membrane in an organism.
B.
types of cells, which work together cooperatively.
C.
types of organs, which work independently of one another.
D.
types of organ systems, which interact with one another to help an organism function.
The correct answer is B. A tissue in a living organism is made up of types of cells, which work together cooperatively. Tissues are groups of cells that have similar structures and functions, and they work together to perform specific roles in the body. Examples of tissues include muscle tissue, nerve tissue, and connective tissue.
Which of the following tables correctly matches the organs to their roles in maintaining homeostasis?
A.
Organ Role
Heart pumps blood to various parts of the body
Lung provides oxygen for the blood
Artery transfers oxygen-rich blood to various parts of the body
Vein transfers carbon dioxide-rich blood from various body parts to the heart
B.
Organ Role
Heart transfers carbon dioxide-rich blood from various body parts to the heart
Lung transfers oxygen-rich blood to various parts of the body
Artery provides oxygen for the blood
Vein pumps blood to various parts of the body
C.
Organ Role
Heart provides oxygen for the blood
Lung transfers carbon dioxide-rich blood from various body parts to the heart
Artery pumps blood to various parts of the body
Vein transfers oxygen-rich blood to various parts of the body
D.
Organ Role
Heart provides oxygen for the blood
Lung transfers oxygen-rich blood to various parts of the body
Artery transfers carbon dioxide-rich blood from various body parts to the heart
Vein pumps blood to various parts of the body
The correct answer is A.
Organ Role
Heart pumps blood to various parts of the body
Lung provides oxygen for the blood
Artery transfers oxygen-rich blood to various parts of the body
Vein transfers carbon dioxide-rich blood from various body parts to the heart
The heart is responsible for pumping blood to various parts of the body, the lungs provide oxygen for the blood, the arteries transfer oxygen-rich blood to various parts of the body, and the veins transfer carbon dioxide-rich blood from various body parts back to the heart. This is how the circulatory system helps maintain homeostasis by delivering oxygen and removing waste products from cells.
Which of the following tables correctly pairs the system with its function in the human body?
A.
System Function
Skeletal removes carbon dioxide while supplying the blood with oxygen
Reproductive protects internal organs and assists in locomotion
Respiratory secretes hormones into the blood that control growth, metabolism, and stress response
Endocrine responsible for the production of offspring
Digestive maintains water and chemical balance by eliminating waste products
Excretory obtains nutrients for the body by breaking down food, absorbing water, and eliminating waste
B.
System Function
Skeletal responsible for the production of offspring
Reproductive secretes hormones into the blood that control growth, metabolism, and stress response
Respiratory obtains nutrients for the body by breaking down food, absorbing water, and eliminating waste
Endocrine removes carbon dioxide while supplying the blood with oxygen
Digestive protects internal organs and assists in locomotion
Excretory maintains water and chemical balance by eliminating waste products
C.
System Function
Skeletal secretes hormones into the blood that control growth, metabolism, and stress response
Reproductive maintains water and chemical balance by eliminating waste products
Respiratory responsible for the production of offspring
Endocrine protects internal organs and assists in locomotion
Digestive obtains nutrients for the body by breaking down food, absorbing water, and eliminating waste
Excretory removes carbon dioxide while supplying the blood with oxygen
D.
System Function
Skeletal protects internal organs and assists in locomotion
Reproductive responsible for the production of offspring
Respiratory removes carbon dioxide while supplying the blood with oxygen
Endocrine secretes hormones into the blood that control growth, metabolism, and stress response
Digestive obtains nutrients for the body by breaking down food, absorbing water, and eliminating waste
Excretory maintains water and chemical balance by eliminating waste products
The correct answer is D.
System Function
Skeletal protects internal organs and assists in locomotion
Reproductive responsible for the production of offspring
Respiratory removes carbon dioxide while supplying the blood with oxygen
Endocrine secretes hormones into the blood that control growth, metabolism, and stress response
Digestive obtains nutrients for the body by breaking down food, absorbing water, and eliminating waste
Excretory maintains water and chemical balance by eliminating waste products
Mitchell created a diagram to describe the levels of organization within a multicellular organism, in order from smallest to largest.
Which mistake did Mitchell make in his diagram?
A.
Mitchell did not correctly describe tissues.
B.
Mitchell reversed the order of tissues and organs.
C.
Mitchell did not correctly describe organ systems.
D.
Mitchell reversed the order of organ systems and organisms.
Based on the given information, Mitchell made the mistake of reversing the order of tissues and organs in his diagram.
The correct order of levels of organization within a multicellular organism, from smallest to largest, is as follows:
1. Cells
2. Tissues
3. Organs
4. Organ systems
5. Organism
Therefore, the correct answer is B. Mitchell reversed the order of tissues and organs in his diagram.
Read the passage about an athlete.
When an athlete's body temperature begins to climb, blood vessels in the skin dilate. As a result, the athlete's face turns red because warm, oxygenated blood moves to the surface of the skin. This process helps to reduce overall body temperature and prevent overheating.
Which organ system most likely helps to keep an athlete from overheating?
A.
the digestive system
B.
the circulatory system
C.
the respiratory system
D.
the reproductive system
The correct answer is B. The circulatory system is most likely the organ system that helps to keep an athlete from overheating. This system includes the heart, blood vessels, and blood, which play a role in the regulation of body temperature. In the given passage, it states that when an athlete's body temperature begins to climb, blood vessels in the skin dilate, allowing warm, oxygenated blood to move to the surface of the skin. This process helps to reduce overall body temperature and prevent overheating.
Blood consists of many different types of cells. These cells work together to keep a person's blood healthy. Which of the following BEST classifies blood?
A.
organ
B.
tissue
C.
organism
D.
organ system
The BEST classification for blood in this context is B. tissue.
Blood is classified as a tissue because it is a group of similar cells that work together to perform a specific function. In the case of blood, it consists of various types of cells such as red blood cells, white blood cells, and platelets, all working together to maintain the health and functioning of the circulatory system.
Which of the following is an example of an organ system?
A.
a human bladder storing waste for removal from the body
B.
a plant's roots absorbing water and minerals from soil
C.
the living material that lines the inside of a cheek
D.
a heart, arteries, and veins all working together
D.
A heart, arteries, and veins all working together is an example of an organ system.
An organ system consists of multiple organs that work together to perform specific functions and maintain the overall health and functioning of the body. In this case, the heart, arteries, and veins are all part of the circulatory system. The heart pumps blood, while the arteries and veins transport the blood throughout the body. Together, they form an organ system responsible for the circulation of blood and the delivery of oxygen and nutrients to the body's tissues.
Which two systems interact most to supply the body with nutrients?
A.
The endocrine system produces hormones that regulate hunger, and the muscular system assists the body in moving food into the stomach.
B.
The digestive system breaks down the food to make it available for absorption, and the circulatory system transports the nutrients to parts of the body.
C.
The nervous system stimulates the appetite, and the excretory system removes waste that was not absorbed by the body.
D.
The skeletal system absorbs all the nutrients needed for the body, and the integumentary system removes excess liquid from food.
The correct answer is B. The digestive system breaks down the food to make it available for absorption, and the circulatory system transports the nutrients to parts of the body.
The digestive system is responsible for breaking down food through mechanical and chemical processes and converting it into nutrients that can be absorbed by the body. Once the nutrients are extracted, they are transported to different parts of the body through the circulatory system, specifically through the blood. The circulatory system then delivers these nutrients to the cells and organs that require them for energy and various other functions.
Therefore, the digestive system and the circulatory system interact most to supply the body with nutrients.
Which organelle in a plant cell captures radiant energy from the Sun?
A.
chloroplast
B.
mitochondrion
C.
ribosome
D.
nucleus
The correct answer is A. chloroplast.
The chloroplast is the organelle in a plant cell that captures radiant energy from the Sun. It contains a green pigment called chlorophyll, which is responsible for capturing light energy and converting it into chemical energy through the process of photosynthesis. This energy is then used to produce glucose and other organic compounds that fuel the plant's growth and metabolism.
The graph below shows how the respiratory system changes as a person goes from resting to running to walking to resting again. The respiration rate is the number of breaths a person takes per minute.
Based on the graph, which of the following is a function of the respiratory system?
A.
to deliver oxygen to cells for cellular respiration at different rates so that different amounts of energy can be made when needed
B.
to detect changes in the outside world through nerve impulses and send these impulses throughout the body
C.
to increase the breathing rate during heavy activity so that more carbon dioxide can be absorbed by respiratory cells
D.
to decrease a person's heartbeat during heavy activity and decrease the flow of blood to areas that will pool with blood
Based on the given graph, the function of the respiratory system can be inferred as:
C. to increase the breathing rate during heavy activity so that more carbon dioxide can be absorbed by respiratory cells.
From the graph, we can observe that as the level of activity increases (from resting to running to walking), the respiration rate also increases. This increase in the breathing rate is an essential function of the respiratory system that allows the body to take in more oxygen and release more carbon dioxide during periods of increased physical exertion.
Therefore, option C best describes the function of the respiratory system based on the information provided.
Choose the sentence that is punctuated correctly.
A.
Penelope scanned the dim crowded room, full of people, for her brother.
B.
Penelope wore a sequined fluorescent dress to the party.
C.
Penelope wrote a long, detailed story for her creative writing class.
D.
Penelope's favorite aunt, Jane, decided to come for a short sweet visit.