Ecosystems
The arrows in a food web _____.
a. point to what the organism eats
b. shows the direction that the energy moves in
c. show that all animals consume other animals
b. shows the direction that the energy moves in
When a material dissolves, it _________.
a. separates with a material it is mixed with
b. changes the state of matter it is in
c. expands into a larger piece of material
d. mixes completely with another material
d. mixes completely with another material
What are Earth’s 4 spheres?
a. atmosphere, stratosphere, mesosphere, thermosphere
b. biosphere, geosphere, hydrosphere, atmosphere
c. ecosystem, weather, climate, landform
d. volcanoes, oceans, forests, clouds
b. biosphere, geosphere, hydrosphere, atmosphere
More than half of Earth’s freshwater is _______.
a. trapped underground
b. flowing in rivers
c. frozen as ice
d. stored in lakes
c. frozen as ice
What is the force that pushes downward towards the center of the Earth?
a. rotation
b. revolution
c. gravity
d. orbit
c. gravity
The Earth _____________.
a. Revolves around the sun
b. Revolves around the moon
c. Spins back and forth
a. Revolves around the sun.
Which of the following BEST describes the role of producers in an ecosystem?
a. They obtain energy by consuming other organisms
b. They break down dead organisms and waste products
c. They convert sunlight into energy (food) through photosynthesis
d. They release carbon dioxide into the atmosphere
c. They convert sunlight into energy (food) through photosynthesis
A change in shape or form of matter that does not form a new substance is called _______.
a. chemical change
b. physical change
c. nuclear change
d. thermal change
b. physical change
What does the prefix "geo" mean?
a. air
b. water
c. rock
d. life
c. rock
What does the prefix "hydro" mean?
a. air
b. water
c. rock
d. life
b. water
When Earth spins on its axis that is known as ________.
a. Orbit
b. Rotation
c. Revolution
d. Radiation
b. Rotation
The daily changes in length and direction of shadows, is due to ________.
a. The Earth’s rotation on its axis
b. The curved shape of the Earth
c. The Sun orbiting the Earth
d. The Earth orbiting the Sun
a. The Earth's rotation on its axis
In a healthy ecosystem __________.
a. there is one large group of a single type of organism
b. organisms never have to compete to use the same resources
c. many different kinds of organisms can meet their needs
d. there are no consumers so producers can grow without being eaten.
c. many different kinds of organisms can meet their needs
In a chemical change, particles that make up two or more substances are rearranged to _______.
a. form a mixture
b. form a new substance
c. mix into a solid
d. mix into a solution
b. form a new substance
What does the prefix "bio" mean?
a. air
b. water
c. rock
d. life
d. life
What is deposition?
a. The breaking down or dissolving of rocks and minerals
b. The movement of broken down rocks and minerals
c. The dropping of rocks and minerals
c. the dropping of rocks and minerals
How long does it take for Earth to make one full rotation on its axis?
a. 24 hours
b. 24 days
c. 1 month
d. 1 year
a. 24 hours
The Earth’s rotation on its axis causes ________.
a. Seasons
b. Day and night
c. Holidays
d. The North and South Pole
b. Day and night
If just one species in a food chain disappears, __________.
a. all of the other organisms will have more food
b. any organisms that depend on that species for food will not be able to meet their needs
c. other organisms will start making their own food
d. no other organisms will be affected
b. any organisms that depend on that species for food will not be able to meet their needs
Which of the following properties is an example of a substance changing into a new substance?
a. wood that is burned
b. gold that is scratched
c. iron that is broken
d. sugar that is dissolved
a. wood that is burned
Which of the following is the best example of two of Earth’s spheres interacting?
a. A rock sitting on a mountain
b. A cloud in the sky
c. Rain falling and washing soil into a river
d. The sun shining on the ocean
c. Rain falling and washing soil into a river
What is the primary source of energy that drives that water cycle?
a. the sun
b. tectonic plates
c. photosynthesis
d. the oceans
a. the sun
How long does it take for the Earth to make one full revolution around the sun?
a. 24 hours
b. 24 days
c. 1 month
d. 1 year
d. 1 year
What is apparent brightness?
a. The actual amount of light a star gives off, no matter where you are
b. How bright a star appears to us here on Earth
c. The color of a star seen from space
d. The heat a star gives off as it burns
b. How bright a star appears to us here on Earth
How are food webs related to food chains?
a. Food webs consist of overlapping food chains
b. Food chains are made up of individual food webs
c. Food chains occur on land whereas food webs occur in water
d. Food chains produce energy for food webs
a. Food webs consist of overlapping food chains
The conservation of mass tells us that matter is never made or lost, it just ________.
a. vanishes
b. changes its form
c. appears
d. dissolves
b. changes its form
What is weathering?
a. The breaking down or dissolving of rocks and minerals
b. The movement of broken down rocks and minerals
c. The dropping of rocks and minerals
a. The breaking down or dissolving of rocks and minerals
What is erosion?
a. The breaking down or dissolving of rocks and minerals
b. The movement of broken down rocks and minerals
c. The dropping of rocks and minerals
b. The movement of broken down rocks and minerals
Why does the Sun appear larger and brighter than other stars?
a. It is a bigger star than the others
b. It burns hotter than all the other stars
c. It is closer to the Earth than other stars
d. All of the above
c. It is closer to the Earth than other stars
The sun's gravity is _________ than Earth because the sun is ___________ than Earth.
a. Stronger than; bigger
b. Stronger than; smaller
c. Weaker than; bigger
d. Weaker than; smaller
a. Stronger than; bigger