Your blood includes different protein molecules called clotting factors.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

What do you think car designers do if the damage caused by a crash test is too severe?

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves