CAST Science Practice Test

CAST Science Practice Test

Assessment

Flashcard

Science

8th Grade

Practice Problem

Hard

Created by

Martha Butler

FREE Resource

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50 questions

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1.

FLASHCARD QUESTION

Front

Predict the changes in the sea urchin population as the kelp population increases.

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Back

Sea urchin population decreases

2.

FLASHCARD QUESTION

Front

Use the graphs and the partial food web to predict the changes in the kelp population as the kelp population INCREASES. What will happen to the kelp population?

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Back

Kelp population decreases

3.

FLASHCARD QUESTION

Front

A student conducts 5 trials to investigate factors affecting the formation of impact craters. The student drops a marble into a box with fine powder. Analyze the results in the graph pictured. Because the mass is 40g in each trial, mass is a...

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Back

constant

4.

FLASHCARD QUESTION

Front

In an experiment where a marble is dropped into a box with fine powder to measure the depth of impact craters, what is the depth considered as?

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Back

dependent variable

5.

FLASHCARD QUESTION

Front

Speed in the experiment of dropping a marble into a box with fine powder to measure the depth of impact craters is the

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Back

independent variable

6.

FLASHCARD QUESTION

Front

A student conducts 5 trials to investigate factors affecting the formation of impact craters. What is true about the results of the experiment?

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Back

As the speed of the marble increases, the depth of the crater increases

7.

FLASHCARD QUESTION

Front

A student conducts 5 trials to investigate factors affecting the formation of impact craters. Which statement BEST describes the results of the investigation?

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Back

The kinetic energy of the marble just before impact is proportional to the depth of the crater it forms

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