Write T or True if the statement is true; write For False if the statement is false. 1. The greenhouse effect is a natural process that supports life on the earth for millions
years.

2. The majority of the Earth's atmosphere is composed of nitrogen and oxygen,
greenhouse gases comprise only a tiny fraction of the atmosphere.

3. All greenhouse gases are created as a result of human activity.

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

Individuals do not compete directly for resources, but are prey for the same predator

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs