Photosynthesis
Where does photosynthesis occur in plant cells?
Chloroplast
Which organelle carries out cellular respiration?
Mitochondria
Where does energy in most ecosystems begin?
The Sun
Which organisms return matter to the soil?
Decomposers
Which organelle controls what enters and leaves the cell?
Cell membrane
What energy source do plants use for photosynthesis?
Sunlight
What type of energy do cells make during cellular respiration?
ATP
Which organisms bring energy into ecosystems?
Producers (Plants)
When plants and animals die, where does their matter go?
Back into the soil and environment.
Which organelle makes food in plant cells?
Chloroplast
What gas do plants take in during photosynthesis?
Carbon dioxide
Which two substances are needed for cellular respiration?
Glucose and oxygen
Why does energy decrease at each trophic level?
aka - how does energy leave the food web?
Energy is lost as heat.
Where does carbon in animals originally come from?
Carbon dioxide in the air
Which organelle stores water in plant cells?
Vacuole
What food molecule is produced during photosynthesis?
Glucose
What gas is released during cellular respiration?
Carbon dioxide
Does energy cycle or flow through ecosystems?
Energy flows.
What happens to atoms during chemical reactions?
They rearrange but are not destroyed.
Which organelle releases usable energy from food?
Mitochondria
Why is photosynthesis considered an endothermic process?
It absorbs energy from sunlight.
Why is cellular respiration classified as exothermic?
Energy is released from glucose.
After a plant, rabbit, and hawk die, how does matter return to the ecosystem?
Decomposers break down organisms and return matter to the environment.
Why does matter cycle but energy does not?
Matter is reused, but energy leaves as heat.
If chloroplasts stopped working, which process would fail first?
Photosynthesis