CAST Science Practice Test

Front

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

Back

Sea urchin population decreases

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?

Back

Kelp population decreases

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...

Back

constant

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?

Back

dependent variable

Front

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

Back

independent variable

Front

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

Back

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

Front

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

Back

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

Front

Select a moon location in the model that supports the explanation that the New Moon phase explains why the disk becomes a ring.

Back

2

Front

Why don't solar eclipses happen every month despite a new moon occurring?

Back

The model should show that the plane of the Moon's orbit around the Earth is inclined relative to the plane of Earth's orbit around the Sun.

Front

Leah conducts two trials to identify a chemical reaction: 1) SiO2 into H2O, 2) AgNO3 into KCl. In which trial did a chemical reaction occur?

Back

Trial 2