How did Kepler develop his second law of motion?(1 point) Responses He invented a telescope that was strong enough to view all planets of the solar system along their orbits. He invented a telescope that was strong enough to view all planets of the solar system along their orbits. He used a telescope to carefully follow and time the orbital motion of Mars. He used a telescope to carefully follow and time the orbital motion of Mars. He compared data of planetary motion at different times along orbits. He compared data of planetary motion at different times along orbits. He made accurate measurements of the positions of all the planets over many years.
According to Kepler’s second law of motion, which statement describes the area swept out by a line between a planet and the sun?(1 point) Responses It is constant for equal times. It is constant for equal times. It increases as the planet moves away from the sun. It increases as the planet moves away from the sun. It increases as the planet approaches the sun. It increases as the planet approaches the sun. It is constant if the planet moves at a constant speed.
It is constant for equal times.
hich does Kepler’s second law state about planetary motion?(1 point)
Responses
The planet travels along an elliptical orbit.
The planet travels along an elliptical orbit.
The square of the orbital period is directly proportional to the cube of the semi-major axis.
The square of the orbital period is directly proportional to the cube of the semi-major axis.
A line between the planet and the sun covers equal areas in equal times.
A line between the planet and the sun covers equal areas in equal times.
Planets move at the same speed at all points along their orbit.
A line between the planet and the sun covers equal areas in equal times.
You have now learned the importance and benefits of weight training and cardiovascular activity. Decide which athlete might use the least amount of weight training in his/her preparation.
(1 point)
Responses
Football player
Football player
Wrestler
Wrestler
Baseball player
Baseball player
Cross-country runner
Cross-country runner
What type of weights should you NOT use if your goal is to build muscle mass?
(1 point)
Responses
Free weights
Free weights
Weight machines
Weight machines
High intensity (heavy weights)
High intensity (heavy weights)
Low intensity (lighter weights)
Low intensity (lighter weights)
What should you always do before lifting weights?
(1 point)
Responses
Drink water
Drink water
Stretch properly
Stretch properly
Talk to a friend
Talk to a friend
Eat
Stretch properly
Which of the following is a weight training machine you may find in a gym?
(1 point)
Responses
Universal machine
Universal machine
Elliptical trainer
Elliptical trainer
Stair climber
Stair climber
Treadmill
Treadmill
Universal machine
________________ are single dumbbells that are held independently in each hand.
Dumbbells are single dumbbells that are held independently in each hand.
what are single dumbbells that are held independently in each hand.
Dumbbells are single weights that are held independently in each hand.
What is the main difference between free weights and a universal machine?
(1 point)
Responses
Universal machines build bigger muscles because they allow for more repetitions.
Universal machines build bigger muscles because they allow for more repetitions.
Universal machines are safer because the weights are not above the body.
Universal machines are safer because the weights are not above the body.
Universal machines are for advanced weight lifters only.
Universal machines are for advanced weight lifters only.
There is no difference.
Universal machines are safer because the weights are not above the body.
The weight lifting bar weighs ___________ pounds.
The weight lifting bar typically weighs 45 pounds.
hich of the following does a good spotter NOT do?
(1 point)
Responses
Help prevent injury
Help prevent injury
Motivate his/her partner
Motivate his/her partner
Supply help if needed
Supply help if needed
Ignore his/her partner
Ignore his/her partner
Which of the following is NOT an upper body weight training exercise?
(1 point)
Responses
Squats
Squats
Bench press
Bench press
Butterflies
Butterflies
Biceps curl
Biceps curl
Squats
Multiple Choice
The detail on p. 199, in "Of Wolves and Men," that describes how the wolf's fur carries seeds to be dispersed along his trail reveals...
(1 point)
Responses
the author’s perspective on events.
the author’s perspective on events.
the wolf’s perspective on events.
the wolf’s perspective on events.
the wolf’s prey’s perspective on events.
the wolf’s perspective on events.
Which word is the best synonym for undistinguished?
(1 point)
Responses
unfed
unfed
unharmed
unharmed
unremarkable
unremarkable
Which sentence below includes a compound verb?
(1 point)
Responses
The wolf pounced on a mouse and ate it.
The wolf pounced on a mouse and ate it.
The wolf’s underfur grew dense and thick.
The wolf’s underfur grew dense and thick.
Hares and caribou are among the wolf’s prey.
The wolf pounced on a mouse and ate it.
Which statement describes Kepler’s third law of orbital motion?(1 point) Responses The square of orbital period is proportional to the semi-major axis. The square of orbital period is proportional to the semi-major axis. The cube of orbital period is proportional to the square of the semi-major axis. The cube of orbital period is proportional to the square of the semi-major axis. The orbital period is proportional to the square of the semi-major axis. The orbital period is proportional to the square of the semi-major axis. The square of orbital period is proportional to the cube of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
Which orbital shape did most scientists in the early 1600s think the planets of our solar system have? (1 point)
O parabolic
O elliptical
circular
O hyperbolic
Circular
Which planet's orbit was Kepler first studying when he began to develop his laws of orbital motion? (1 point)
Mars
Jupiter
Saturn
Earth
Mars
Which is the best description of Earth's orbit? (1 point)
almost circular
O highly elliptical
circular
parabolic
almost circular
Drag each item to the correct location, so that each contribution to the theory of universal gravitation is matched with the scientist responsible for it. (2 points)
Johannes Kepler
Robert Hooke
Isaac Newton
:: First proposed the idea that a force of attraction applied to all objects in space
Used mathematics to prove that gravity increases with decreasing distance between objects
Described the motion of planets around the sun as elliptical
Johannes Kepler: Described the motion of planets around the sun as elliptical.
Robert Hooke: Used mathematics to prove that gravity increases with decreasing distance between objects.
Isaac Newton: First proposed the idea that a force of attraction applied to all objects in space.
Which of the eight planets in the solar system has the most elliptical orbit? (1 point)
Mars
Mercury
Earth
Venus
Mercury
Drag each item to indicate whether it is related to Aristotle's or Ptolemy's model of the solar system, or to both. Some items may be used twice. (2 points) page 8
Aristotle's Model
Ptolemy's model
:: geocentric
:: planets fixed on epicycles
:: planets fixed on nested spheres
:: accurately predicted the positions of the planets
Aristotle's Model: geocentric, accurately predicted the positions of the planets.
Ptolemy's model: planets fixed on epicycles, planets fixed on nested spheres.
Drag each item to the correct location. (2 points)
Geocentric Model
Heliocentric Model
:: The orbits of the planets are circular.
:: The Sun is at the center of the solar system.
::Includes five planets.
Includes eight planets.
:: The orbits of the planets are elliptical.
Earth is at the center of the solar system.
Geocentric Model: The orbits of the planets are circular, Earth is at the center of the solar system, Includes five planets.
Heliocentric Model: The Sun is at the center of the solar system, Includes eight planets, The orbits of the planets are elliptical.
Why does the speed of a planet decrease as it moves away from the sun? (1 point)
The sun's gravitational pull on the sun decreases.
The planet's inertia begins to point backward along its orbit.
The planet's inertia begins to point inward toward the sun.
The direction of the sun's pull relative to the planet's motion changes.
The direction of the sun's pull relative to the planet's motion changes.
Why was the Copernican model a controversial proposition? Select the three correct answers. (2 points)
It contradicted religious doctrine of the time.
It was mostly incorrect.
It contradicted established scientific understanding.
It was not supported by observations.
It demoted Earth to just another planet.
It was a complex model.
The three correct answers are:
1) It contradicted religious doctrine of the time.
2) It contradicted established scientific understanding.
3) It demoted Earth to just another planet.
Which statement about the development of Newton's theory of universal gravitation is correct? (1 point)
Isaac Newton described the existence of gravitational force mathematically, but he built upon the ideas of other scientists before him.
Isaac Newton was the first scientist to propose the idea that gravity increases as distance between objects decreases.
Johannes Kepler and Isaac Newton worked together to define gravity as a force on Earth.
The ideas of scientists such as Nicolaus Copernicus and Robert Hooke contradicted Newton's theory of universal gravitation.
Isaac Newton described the existence of gravitational force mathematically, but he built upon the ideas of other scientists before him.
Select the correct answer to complete the sentence. Gravitational force is said to be universal
because: (1 point)
it applies to all objects.
it operates only within our solar system.
it applies mainly to planets and moons.
it operates in one direction.