Mega Review

How many Valence Electrons are in this atom?

• 1

• 13

• 12

• 2

Tags

NGSS.MS-PS1-1

If there are 2 valence electrons in this atom that means it belongs to what GROUP?

• 1

• 2

• 12

• 14

Tags

NGSS.MS-PS1-1

The hotter the temperature the faster the molecules move around.

• True

• False

Answer explanation

True. As temperature increases, the kinetic energy of molecules also increases, causing them to move faster. Therefore, the hotter the temperature, the faster the molecules move around.

Tags

NGSS.MS-PS1-4

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

At which point is potential energy greatest?

• W

• X

• Y

• Z

Answer explanation

Potential energy is greatest at point W because it is the highest elevation in the given context, where gravitational potential energy is maximized. Points X, Y, and Z are lower, resulting in less potential energy.

Tags

NGSS.MS-PS3-2

The geologic time scale represents Earth's ________ year history.

• 2.5 million

• 9 million

• 1 billion

• 4.6 billion

Tags

NGSS.MS-ESS1-4

The breaking down of rocks into smaller pieces is called _________.

• fossils

• weathering

• erosion

• intrusion

Tags

NGSS.MS-ESS2-2

Rock made from sediment compacted by the weight of sediment layers above are called __________ rock.

• intrusion

• metamorphic

• sedimentary

• volcanoes

Tags

NGSS.MS-ESS1-4

The hotter the temperature the faster the molecules move around.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4