Which soil particles are the biggest and can be seen with the naked eye? a) Silt b) Clay c) Sand d) Humus
c. sand
What happens when rocks are broken down over time? a) They mix with organic materials b) They turn into magma immediately c) They disappear completely d) They change directly into water
a) They mix with organic materials
G_______________: Consists of millions and billions of stars.
GALAXY.
What happens after rocks are broken down by weathering? a) They disappear completely b) They turn into magma c) Erosion transports the bits of rock and minerals away d) They immediately become soil
c) Erosion transports the bits of rock and minerals away
Which factor influences the rate of weathering and the formation of humus? a) Parent rock b) Time c) Climate, temperature, and rainfall d) Topography
c) Climate, temperature, and rainfall
S_______________: Moves around Earth.
SATELLITE.
P_______________: Spherical body of various size, with no light of its own.
PLANET.
A comet’s core is made of gas only. True or False
FALSE. A comet’s core (called the nucleus) is made of ice, dust, and rock, not just gas.
S___________ S___________: Consists of many planets, comets, asteroids and the sun
SOLAR SYSTEM
A star is a luminous body that shines at night. True or False
TRUE.
M_______________: They are metallic or rocky bodies of reduced size.
METERIOTE.
What is soil composed of? a) Only sand and water b) Organic and inorganic materials c) Only organic materials from living organisms d) Onl
b) Organic and inorganic materials. Soil is made of inorganic materials (sand, silt, clay, minerals, rocks) and organic matter (humus from dead plants and anima
Earth is the only planet in the universe. True or False
FALSE. Earth is the only planet known to support life, but it is not the only planet in the universe
Which of the following can help prevent erosion? a) Cutting down trees b) Planting grass and trees c) Leaving soil bare d) Removing rocks
b) Planting grass and trees
What kinds of soil are most easily eroded by water? a) Sandy soils b) Clay soils c) Rocky soils d) None of the above
a) Sandy soils
Why is some soil darker than others? a) Because it has more rocks b) Because it has more sand c) Because it contains more humus d) Because it is older
c) Because it contains more humus
A_______________: Piece of rock with no definite shape or size
ASTEROID.
Is the moon a natural satellite? Yes or No.
Yes.
S_______________: Luminous body formed by gas.
STAR.
Label each layer of the soil. (Weathered Rock Fragments, Bedrock, Topsoil, Subsoil, Humus)
Humus, Topsoil, Subsoil, Weathered Rock Fragments, Bedrock
Removing vegetation from an area can increase erosion. True or False
TRUE.