Show:
Earth's Ecosystems
Photosynthesis
Microscopic Organisms
Webs, Chains, & Pyramids
Earth's Cycles
100
What is the pH of water?
7
100
How do animals help plants in the process of photosynthesis?
They breathe out carbon dioxide.
100
What is an electron microscope?
Uses electrons (electricity), instead of light, to enlarge samples.
100
What happens to the amount of energy and number of organisms as you move up an energy pyramid?
Energy and number of organisms decreases.
100
What are the four types of precipitation?
Rain, sleet, hail, & snow.
200
What is the difference between biotic & abiotic factors?
Biotic - living Abiotic - nonliving
200
What is the job of a chloroplast?
It turns sunlight into food for the plant.
200
What is a diatom?
A very small, photosynthetic protist that is found in water.
200
What is the difference between a food chain and web?
A food chains shows how energy flows from one organism to another. A food web shows how food chains overlap.
200
What are the four types of fossil fuels discussed?
Coal, oil, gasoline, & natural gas.
300
Where are acids on the pH scale?
Less than 7
300
How is photosynthesis different from respiration?
Photosynthesis stores energy. Respiration releases energy.
300
What is a protist?
A single-celled eukaryotic organism that cannot be clearly classified as animal or plant.
300
How are decomposers and scavengers different?
Scavengers seek out the remains of dead animals. Decomposers break down dead organisms and return nutrients to the soil.
300
What are the four steps in the water cycle?
The Sun heats water and it evaporates. As it rises it cools and condenses. Water accumulates in clouds and falls as precipitation. Water collects on land and flows into the oceans.
400
Where are bases on the pH scale?
Greater than 7
400
What is the function of the stomata?
Stomata regulate the amount of carbon dioxide and water that is leaving the plant.
400
What is the difference between an prokaryote and a eukaryote?
Prokaryote does not have a nucleus in each cell. Eukaryote has a nucleus in each cell.
400
What is the difference between carnivores, omnivores, and herbivores?
Carnivores eat only other animals. Omnivores eat producers and other organisms. Herbivores eat only producers.
400
What are three ways that carbon enters the atmosphere?
When animals exhale. When plants and animals decay. When fossil fuels are burned.
500
Why is soil important to an ecosystem?
Soil supplies the water, air, and nutrients that plants need in order to grow.
500
How is transpiration different from root pressure?
Transpiration is when water is pulled up plant as water is evaporated out of the leaves. Root pressure is when water is pushed up the plant because of pressure in the soil on roots.
500
Describe three types of protists, their parts, and what those parts do.
Amoeba have pseudopods that help the move and get food. Ciliates have cilia that help them move and get food. Flagellates have flagella that help them move.
500
What are predators & prey, and producers & consumers?
Predators hunt and kill animals for food. Prey get hunted. Producers make their own food. Consumers get their energy from eating other organisms.
500
How does nitrogen get into soil and into animals?
Lightning makes N water-soluble, it enters precipitation, and enters the soil through rainwater. Bacteria in roots take N from the air, other bacteria convert this to nitrates that plants absorb. Animals eat plants and N is passed along. When plants and animals die, N is returned back into the soil from remains.