Quiz 2 Scientific method earth science grade 9 (LUOA)

A hypothesis is ____________________.

An educated guess

Which of the following are measurable?

How often a plant is watered The actual number of new leaves on a plant How much sunlight a plant receives

Which of these are steps in the scientific method? (Select all that apply)

Hypothesis Conclusion Analysis

You research your favorite topic: earthquakes. You build a tall Lego building. You want to know which type of motion is most damaging to your building. You discover in your research that side-to-side motion is the worst. You will place the building on a piece of wood and shake it for durations of 30 seconds, 60 seconds, and 90 seconds. You will try an up-and-down motion and side-to-side motion. Give an example of a proper hypothesis.

If the Lego building was shaken with a side to side motion, it will result in the most destruction.

How do scientists prove a scientific theory before it becomes widely accepted? (Select all that apply)

Scientists collect results from many, many different experiments Scientists design multiple experiments Scientists test other scientists' results to see if they get the same results Scientists do experiments over and over again, getting facts to see if they can disprove the theory

Analysis is _______________.

The step in which you look for connections in your data

Convert this number written in scientific notation to standard notation. 3.00769 x 10-8

.0000000300769

The number of stars in the sky is estimated to be 70,000 million million million. How many significant figures is this?

1

4.687 x 217.32 = Round the answer using proper significant figures.

1019

Write 343,642 in scientific notation using the following format: number x 10^e

3.43642 x 10^5

Match all the numbers to their significant figures 3 sig figs 2030.001 2 sig figs 1006 0.0000006 4 sig figs 3,423.02 5 sig figs 496,200. 6 sig figs 1 sig fig

348,000 7 sig figs 23000 4 sig figs 1 sig figs 250.0 6 sig figs 93,025 6 sig figs 0.0007

62.875 - 21.63421 = Round the answer using proper significant figures

41.241

Density is equal to mass divided by volume. The mass of a metal is 10.34 g. Its volume is 1.83 ml. Calculate its density. Use the proper number of significant figures.

5.65

Round 896.703 to the nearest hundredth.

896.70

The distance from the Earth to the sun is 92,000,000 miles. Convert 92,000,000 to significant figures.

9.2 X 107

What is a control variable?

A basis for comparison

If you really weigh 180 pounds, and you step on a scale, and it says you weigh 180 pounds the scale is [ Select ] ["falsifiable", "observable", "imprecise", "accurate"] . If you get off the scale and weigh yourself several more times, getting 182 pounds, 178 pounds, and 185 pounds, the scale is [ Select ] ["flasifiable", "accurate", "imprecise", "obsevable"] . (Write your answer in lower case.)

Accurate Imprecise

A scientific theory should always be _________________________.

based on a full set of proven facts

Which one of these is not a step in the scientific method?

independent variable

A circle or pie graph is usually used to show ______________.

percentages