California Science Test

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

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-PS2-2

NGSS.MS-PS3-1

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

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 records properties of the substances she mixed before and after the trials. Which property or properties show that a chemical reaction occurred?

• State of matter ONLY

• Mass

• Color ONLY

• Both state of matter and color

Tags

NGSS.MS-PS1-2

Leah made a model of the reaction between Iron and Copper Sulfate. However, it needs improvements. Which statement best describes which improvements need to be made?

• The mass of the reactants does not equal the mass of the products.

• The number of atoms for the reactants is different than the products

• The number of atoms for the reactants is the same as the products

• The composition of atoms for the reactants is different than the products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to this model, what are the products made from the chemical reaction?

• Fe

• CuSO₄

• Cu

• FeSO₄

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Leah combined Fe and CuSO₄ and measured the masses before and after a reaction. What is the total mass of the reactants?

• 96 grams

• 25 grams

• 71 grams

• 192 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5