science

can someone check my work? unit test, dont wanna fail:))

1. What term describes physical weathering due to collisions between sand and sediment carried in moving water and the rock surface over which the water flows?

a. abrasion

b. wedging ***

c. dissolving

d. erosion

2. The Rocky Mountains began forming in the western United States about 60 million years ago. The Appalachian Mountains and the Rocky Mountains were similar in height when they first formed. Which statements about the Rocky Mountains are true? Select the two correct answers.

a. They are shorter than the Appalachian Mountains.

b. They are older than the Appalachian Mountains. ***

c. They are taller than the Appalachian Mountains. ***

d. They are younger than the Appalachian Mountains.

3. What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased?

a. stromatolites

b. fossil record ***

c. rust deposits

d. anaerobic organisms

4. What is an example of a physical weathering?

a. a rock wearing down due to acid rain

b. bits being blown off a rock by heavy winds ***

c. a metal tool left outside beginning to rust

d. microscopic organisms producing compounds that break down rock

5. Which of these facts could you determine by reading the geologic time scale? Select the two correct answers.

a. the events that ended major divisions of geologic time ***

b. the number of eras in Earth's history ***

c. the life forms that lived in each era

d. how old Earth is

6. What evidence is there that oxygen levels in the sea increased due to photosynthetic bacteria?

a. global cooling ***

b. rust deposits in today’s ocean

c. rust deposits in the ancient ocean

d. decreases in anaerobic organisms

7. In a small bay that contains a coral reef, the water temperature has remained the same for decades. Recently, scientists discovered that the water temperature in the bay has increased by 1°C. Which is most likely to happen?

a. The corals in the reef will immediately die.

b. The coral reef will experience a bleaching event. ***

c. The coral in the reef will gain more zooxanthellae.

d. The coral reef will undergo a period of intense growth.

8. Which process is an important part of chemical weathering through oxidation?

a. oxygen giving up protons to other elements

b. oxygen capturing electrons from other elements

c. oxygen giving up electrons to other elements ***

d. oxygen capturing protons from other elements

9. Which describes the physical weathering of rock by water?

a. Water carries away pieces of rock.

b. Water dissolves rock into a solution.

c. Water dissolves rock into a solution.

d. Water breaks down a rock into smaller pieces with the same composition as the larger rock. ***

10. Which describes the Grand Canyon as it will be one million years from today? Select the two correct answers.

a. It will become narrower, as weathered rock collects at the canyon’s edges.

b. It will become wider, as the edges of the canyon are weathered and eroded. ***

c. It will become deeper, as the Colorado River continues to carve into the rock. ***

d. It will become shallower, as the Colorado River deposits sediment in the canyon.

11. Why do scientists know very little about life in the Precambrian eon?

a. The eon started with a mass extinction.

b. There are few fossils from that time.

c. There was no life on Earth during that eon.***

d. All of these forms of life are now extinct.

thank you if you are able to check them all for me!

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  1. I dunno rn, sorry no one responded man.

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  2. Im taking this test rn lol

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  3. What did you make on test ?

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  4. that is hard

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  5. Man so sorry no one was able to help u for your work but you got this, you can do it

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  6. What is the process of wearing rocks down into smaller pieces and then taking them away called?

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  7. It’s abrasion

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  8. what did u get on the test?

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  9. The answer is B and C to #10. I just took the test

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  10. Never mind here are answers
    1. Abrasion
    2. Cyanobacteria begin to photosynthesize, Cyanobacteria become the chloroplast of plants, Bryophytes become the first land plants, Plants evolve to have vascular tissue to transport water.
    3. bits being blown off a rock by heavy winds
    4. Fossil record
    5. It will become deeper, as the Colorado River continues to carve into the rock.
    It will become wider, as the edges of the canyon are weathered and eroded.
    6. The coral reef will experience a bleaching event.
    7. rust deposits in the ancient ocean
    8. There are few fossils from that time.
    9. Water breaks down a rock into smaller pieces with the same composition as the larger rock.
    10. How old earth is, The number of eras in Earth’s history
    11. They are taller than the Appalachian Mountains.
    This probably wasn’t worth it knowing everyone seeing this will forget about me in a couple minutes to a hour at most haha

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  11. Duuuude thank you

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