In biological systems, the catalyst for a chemical reaction is usually proteins called

A screw is a simple machine. How does it work

1. What is the difference between traits and characteristics? Which is within an individual's control

The Declaration of Independence is divided into a preamble and three main sections. The first main section

What is your preliminary idea (s) of the species of bacteria responsible for anna's infection? has your idea changed since the last activity? explain your reasoning?

When gina was 10, she swam in the ocean for the first time. she remembers the feeling of kicking her feet, slicing her arms through the water, tasting the tangy salt water, floating her on her back, and learning from her father that salt water is

Transport of materials into a cell against a concentration gradient, from low to high, requires A) water. B) energy. Eliminate C) osmosis. D) a passageway.

As ocean water in a tide pool warms and evaporates, the remaining water becomes a. cooler. b. saltier. c. calmer. d. darker.

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?