Cast Science

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

• Sea urchin population increases

• Sea urchin population decreases

• Sea urchin population remains steady

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

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...

• constant

• control

• dependent variable

• independent variable

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

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 to measure the depth. Analyze the results in the graph pictured. Depth is the

• constant

• control

• dependent variable

• independent variable

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 at different speeds to measure the depth. Analyze the results in the graph pictured. Speed is the

• constant

• control

• dependent variable

• independent variable

Tags

NGSS.MS-PS3-1

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

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

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

• As the speed of the marble increases, the depth of the crater stays the same

Tags

NGSS.MS-PS3-1

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

• 1

• 2

• 3

• 4

Tags

NGSS.MS-ESS1-1

A student reviews the model shown and says that, based on the model, a solar eclipse should happen every time there is a new moon. However, solar eclipses occur less often than New Moons. Which feature of the model should be revised to best explain why solar eclipses do not happen every month?

• The model should show that the shape of the Earth's orbit around the Sun is an ellipse.

• The model should show that the shape of the Moon's orbit around the Earth is an ellipse.

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

• 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.

Tags

NGSS.MS-ESS1-1

Leah is learning to use properties of substances to identify a chemical reaction. She conducts two trials. In the first trial, she pours silicon dioxide (SiO2) into water (H2O). For the second trial, she pours silver nitrate (AgNO3) solution into a test tube with a solution of potassium chloride (KCl). Look at the diagram. In which trial did a chemical reaction occur?

• Trial 1

• Trial 2

• Both trial 1 and trial 2

• No chemical reaction happened in either

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Leah is learning to use properties of substances to identify a chemical reaction. She conducts two trials. In the first trial, she pours silicon dioxide (SiO2) into water (H2O). For the second trial, she pours silver nitrate (AgNO3) solution into a test tube with a solution of potassium chloride (KCl). Look at the diagram. Leah knows a chemical reaction occurred in Trial 2 because

• a substance with a new properties was made (new white solid)

• the same substances remained

Tags

NGSS.MS-PS1-2

Leah conducts two trials to mix chemicals together. What is true about the products of the reaction?

• W is a solid substance

• X is a liquid substance

• Z ia s white solid substance

• Y is a solid substance

Tags

NGSS.MS-PS1-2