Tracking scores from past assignments

Two abiotic factor that effect an ecosystem are;

It is difficult to observe 1-nanometer, 1 millimeter, and 100 meter radiation with ground-based telescopes. What are the reasons for each?

The diagram below shows the reactants and products of a chemical reaction. What property of reactions does this diagram illustrate? Carbon + Oxygen arrow Carbon dioxide A. Energy is always produced in a synthesis reaction. B.

What is the gravitational potential energy of a book with a mass of 0.30 kg on a 1.0 m high desk?

Hich of the following describes the sequence of events that most likely lead to the origin of life on Earth? Individual atoms combined to form simple molecules, which combined to make more complex molecules.

Because the moon rotates once for each revolution around Earth, Choose one answer. a. you see some phases more than others. b. a different side of the moon faces Earth each day. c. you never see the far side of the moon.

Planet A takes 1 year to go around its star at an average of 1 A. U. distance. Planet B is 4 A. U. from the star. Calculate how long Planet B takes to orbit.

Average mass of a toy car (small, hot wheels) ?

A pwc capsizes. what is the best way to roll the pwc to turn it upright?

Which biome has the most extreme conditions