6th Grade Review Terrier Time

Water can exist on Earth as...

• solid ice

• liquid water

• water vapor (gas)

• all of the above

Answer explanation

Water can exist in three states on Earth: as solid ice, as liquid water, and as water vapor (gas). Therefore, the correct answer is 'all of the above', as it encompasses all forms of water.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

Where would water NOT flow to?

• the top of a hill

• a delta

• the Gulf of Mexico

• the Pacific Ocean

Answer explanation

Water flows downhill due to gravity. Therefore, it would not flow to the top of a hill, as that is the highest point. Instead, it flows to lower areas like deltas, the Gulf of Mexico, or the Pacific Ocean.

Tags

NGSS.MS-ESS2-4

These are pollutants that are impossible to trace back to their original source

• Point source pollutants

• Non-point source pollutants

• Nuclear pollutants

• All pollution can be easily traced to an original source

Answer explanation

Non-point source pollutants are diffuse and originate from multiple sources, making them difficult to trace back to a single origin. In contrast, point source pollutants come from identifiable sources.

Tags

NGSS.MS-ESS3-3

Water from precipitation that flows over Earth's surface is known as -

• surface runoff

• groundwater

• accumulation

• subsurface runoff

Answer explanation

Water from precipitation that flows over the surface of the Earth is referred to as surface runoff. This term specifically describes the movement of water across the land, distinguishing it from groundwater and subsurface runoff.

Tags

NGSS.MS-ESS2-4

Household waste water goes directly to -

• a filter in the pipes

• a nearby stream, river, or lake

• a power plant

• a water treatment plant

Answer explanation

Household wastewater is directed to a water treatment plant where it is processed to remove contaminants before being released back into the environment, making 'a water treatment plant' the correct answer.

What abiotic factor supplies the energy needed for the water cycle?

• the moon

• plants

• the sun

• fossil fuels

Answer explanation

The sun is the primary abiotic factor that provides the energy necessary for the water cycle. It heats water in oceans and lakes, causing evaporation, which is a key process in the cycle.

Tags

NGSS.MS-ESS2-4

Excess (too many) fertilizers in a body of water can cause which of the following situations?

• Makes the water have less nitrogen and more oxygen

• Creates algal blooms in bodies of water which will overpopulate leading to ecosystem collapse

• Increases the temperatures of the water

• Causes the whole ecosystem to become healthier and more biodiverse

Answer explanation

Excess fertilizers lead to nutrient overload, causing algal blooms. These blooms can deplete oxygen and block sunlight, resulting in ecosystem collapse, making this the correct choice.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An area of land where the surface water & groundwater drain into a particular body of water is called a(n) -

• watershed

• tributary

• aquifer

• habitat

Answer explanation

A watershed is the area of land where all the surface water and groundwater drain into a specific body of water. This makes 'watershed' the correct answer, as it directly relates to the drainage of water.

Tags

NGSS.MS-ESS2-4

What is the primary source of energy driving Earth's processes?

• Earth's core

• the moon

• the sun

• radioactive decay

Answer explanation

The primary source of energy driving Earth's processes is the sun. It provides the heat and light necessary for weather, photosynthesis, and other vital processes, making it the most significant energy source for our planet.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Why does Earth's surface heat unevenly?

• Sun's intensity is constantly changing

• The Earth is tilted on its axis

• Earth's orbit is irregular and shifts often

• The regular movement of tectonic plates

Answer explanation

The Earth is tilted on its axis, causing different areas to receive varying amounts of sunlight throughout the year. This tilt leads to seasonal changes and uneven heating of the Earth's surface.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-6