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8thGrade lifeScience

Life Science

Which is NOT a main idea of the cell theory? The cell is the smallest unit of life
Which is NOT one of the 6 main kinds of atoms that make up the molecules of living things? Lead
What substance makes up most of your body's mass? Water
Sugar, Starch, Cellulose, and chitin are all types of? Proteins
What is a difference between the cell membrane and the cell wall? The cell membrane is selectively permeable, but the cell wall allows substances to pass threw freely
The slope of a line on a speed-time graph is equal to the________of an object? Acceleration
Which does bot define a reference direction relative to a reference point? +5 cm