CMAS Science

An astronaut drops a hammer on the Moon, and a scientist drops an identical hammer on Earth. Both hammers are dropped from the same height. The hammer dropped on Earth falls to the ground faster than the hammer dropped on the Moon. Why does the hammer on Earth fall faster than the hammer on the Moon?

• Earth has a stronger magnetic field than the Moon because Earth orbits the Sun.

• Earth has a stronger magnetic field than the Moon because Earth has an iron core.

• Gravitational attraction is stronger on Earth than on the Moon because Earth rotates on its axis.

• Gravitational attraction is stronger on Earth than on the Moon because Earth has a larger mass.

Tags

NGSS.MS-PS2-4

8.ESS.1.02 The diagram shows the relative heights of ocean tides on Earth at a particular time. Which diagram shows one possible location of the Moon at the time when these tides occur?

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Tags

NGSS.MS-ESS1-1

Which of the following processes created the high mountains of the Himalayas?

• glacial erosion

• physical weathering

• the deposition of sediments

• the collision of tectonic plates

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which of the following demonstrations would best show how Earth’s tectonic plates interact with the layer directly beneath the plates?

• gluing the blocks onto solid rock

• burying the blocks in a bed of dry sand

• sliding the blocks along the top of warm solid metal

• floating the blocks on a slowly moving pool of thick mud

The map below shows the locations of two cities. City Y is near the coast, and city Z is near the middle of a continent. The cities have the same elevation. Based on the map, which of the following statements describes how the climates of the two cities are most likely different?

• City Y receives less rain than city Z.

• City Y has colder winters than city Z.

• City Y has cooler summers than city Z.

• City Y receives more sunlight than city Z.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which of the following is most similar to the number of stars in a galaxy?

• the number of galaxies in the universe

• the number of layers that make up Earth

• the number of stars in our solar system

• the number of planets in our solar system

How is an object's mass related to the force needed to accelerate the object?

• Mass determines the direction of the force needed

• Mass determines the kind of force needed

• The greater the mass, the greater the force needed

• The smaller the mass, the greater the force needed

Tags

NGSS.MS-PS2-2

S8P1a A diagram of a particle is shown above. The particle is most likely _________.

• an atom

• a molecule

• a homogeneous mixture

• a heterogeneous mixture

Tags

NGSS.MS-PS1-1

When enough heat is added to liquid water, it boils, and bubbles of water vapor rise to the surface and into the air. Which type of change is this and why?

• a chemical change because gas is produced

• a chemical change because heat is produced

• a physical change because the identity fo the substance changes

• a physical change, because the substance changes state

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

According to the law of conservation of matter, which of the following is true?

• In a chemical reaction, the total mass of the reactants is greater than the total mass of the products.

• In a chemical reactions, the total mass of the reactants is equal to the total mass of the products

• In a chemical reaction, elements change into other elements, but new matter is not created

• In a chemical reaction, matter cannot change form, but new matter can be created

Tags

NGSS.MS-PS1-5