Chemicals such as carbon and nitrogen cycle through ecosystems. So energy through an ecosystem and
matter .

Scientist have long study the earths climate by looking at which of the following? the earths orbit. the earths rock layers. the antarctic ice. the earths oceans.

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

Which of the following is a good strategy when it comes to desserts