You observe two beakers explaining clear liquid and ice cubes. In the first beaker, the ice cubes are floating. In the second, the ice cubes are on the bottom of the beaker. Write a hypothesis to explain the difference in your observations about the two beakers.

You are given vegetable coloring and three beakers. The first beaker contains water at room temperature, the second beaker contains ice water, and the third beaker contains hot water. Design an experiment to determine the effects of temperature on the rate of diffusion. Be sure to state your hypothesis and to include a control.

Use what you know about the vocabulary words to explain the differences in the following sets of words. Then explain how the words are related. cloud chamber—bubble chamber

A bag contains 16 fake diamonds and 8 real diamonds that are identically shaped. If 5 diamonds are randomly selected from the bag, what is the probability that 2 are fake and 3 are real?

Which of the following are organic molecules? Select all that apply.

a. Water: H2O

b. Methane: CH4

c. ATP: C10H16N013P3

d. Carbon Dioxide: CO2

e. Glucose: C6H1206

The shift of population from the countryside to a city is called a. land use. b. land cover. c. urbanization. d. infrastructure.

What is a buffer? Why is it useful to cells?

Name the three deserts found in the United States.

Find f(a), f(a + h), and the difference quotient $\frac{f(a+h)-f(a)}{h},$ where $h \neq 0.$ $f(x)=3 x^{2}+2$

Which of the following represents the foci of the hyperbola $\frac{y^{2}}{9}-\frac{x^{2}}{25}=1$? A. $(0, \pm 2 \sqrt{2})$, B. $(0, \pm \sqrt{34})$, C. $(\pm 2 \sqrt{2, 0})$, D. $(\pm \sqrt{34, 0})$.

Suppose you had two plants-a cactus and a palm. You planted them in soil and watered them daily. After two weeks, the cactus was dead. What scientific methods could you use to find out why the cactus died?

What should you do if your data are different from what you expected? A) Conclude that you made a mistake in the way you collected the data. B) Change your data to be consistent with your expectation. C) Conclude that you made a mistake when you recorded your data. D) Conclude that your expectation might have been wrong.

Which of the following describes variables that stay the same in an experiment? A) dependent variables B) independent variables C) constants D) controls

Which of the following questions could NOT be answered using scientific methods? A) Should lying be illegal? B) Does sulfur affect the growth of grass? C) How do waves cause erosion? D) Does land heat up faster than water?