science

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus

Tags

NGSS.MS-LS2-3

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Tags

NGSS.MS-ESS2-1

Which of the following types of soil has the largest particles?

• sand
• silt
• humus
• clay

_______ is the type of soil used most often with plants and on farms. It is a mixture of clay, sand, and silt.

• loam
• humus
• soil
• dirt

Tags

NGSS.MS-LS2-3

Which type of soil can hold the greatest amount of water?

• sand
• silt
• clay
• loam

Tags

NGSS.MS-ESS2-4

What cause land pollution?

• People throw too much rubbish in the sea.

• People throw too much rubbish everywhere.

• People reduce making rubbish.

• People reuse things.

Tags

CCSS.RI.4.5

CCSS.RI.5.5

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.5

The ozone layer protects us from

• UV rays
• CFCs
• Increased atmospheric heat
• Decreased atmospheric heat

Which of the following is not a natural cause of water pollution?

• Volcanoes
• Animal waste
• Oil spills
• Silt from storms and floods

The sound level which is comfortable for the human ear.

• 80-85 decibels

• 120-125 decibels

• 60-65 decibels

• 100-105 decibels

Which land biome is mainly covered with grass?

• Desert

• Taiga

• Grassland

• Tundra