Stem Ch 1 Online Test

19 Questions | By Mjsmom827 | Last updated: Sep 19, 2016 | Total Attempts: 172

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Covers the properties of life, organization of life, the scientific method and the microscope.

Questions and Answers

1.

What is the spontaneous generation theory?
2.

What is a hypothesis?
- A.
  
  A theory
- B.
  
  An educated guess
- C.
  
  A Fact
- D.
  
  An inference
- E.
  
  An observation
3.

Which sentence best describes the importance of using a control group?
- A.
  
  When you use a control group you don't need a large sample size.
- B.
  
  When you have a control group you don't have to do any calculations.
- C.
  
  Control groups allow you to compare those recieving the variable and those that are not.
4.

The measurable factor in an experiment is known as the
- A.
  
  Independent variable.
- B.
  
  Dependent variable
- C.
  
  Controlled variable
5.

Suzy wanted to know if thicker candles burn longer than thinner candles. Her hypothesis was that if she used a thick candle that it would burn for the longest amount of time. She got ten candles that were all the same brand, height, smell, and color. The only difference in the candles was they were all a different size, She lit them at the same time and recorded how long it took for each candle to burn out. What was her independent variable?
- A.
  
  Thickness of the candle
- B.
  
  Length of time the candle burned
- C.
  
  Color of the candle
6.

Janet wanted to see if the height of a person affected the length of their handspan. She measured three people's heights, and measured their handspans. She found that the taller a person is, the longer their handspan is. What is wrong with her experiment?
- A.
  
  She tested too many variables at once.
- B.
  
  She did not test a large enough sample of people.
- C.
  
  She did not control all of the variables.
7.

Which hypothesis would have been supported by the data from this graph?
- A.
  
  If Stride is chewed, then most kids will like it.
- B.
  
  If Hubba Bubba is chewed, then the flavor will last the longest.
- C.
  
  If Big red is chewed, then it will have the smallest bubble.
8.

A scientist plants two rows of corn for experimentation. She puts fertilizer on row 1 but does not put fertilizer on row 2. Both rows receive the same amount of water and light intensity. She checks the growth of the corn over the course of 5 months. What is one controlled variable in this experiment?
- A.
  
  Amount of water
- B.
  
  Growth of corn
- C.
  
  Type of fertilizer
9.

What would be a controlled variable in the experiment from this graph?
- A.
  
  Number of times gum is chewed
- B.
  
  Brand of bubble gum
- C.
  
  Size of bubble
10.

Biology is the study of
- A.
  
  Minerals
- B.
  
  Life
- C.
  
  The weather
- D.
  
  Energy
11.

Homeostasis in simpler terms means
- A.
  
  A change over long periods of time
- B.
  
  Keeping things the same
- C.
  
  Rapid change
- D.
  
  The same thing as evolution
12.

Which of the following is NOT necessarily a characteristic of living things?
- A.
  
  Homeostasis
- B.
  
  Metabolism
- C.
  
  Complexity
- D.
  
  Reproduction
13.

The smallest units that can carry on all the functions of life are called
- A.
  
  Molecules
- B.
  
  Cells
- C.
  
  Organelles
- D.
  
  Species
14.

An educated guess, or a(an) ________________________, may be tested by experimentation.
15.

A ____________________ experiment is one in which the condition suspected to cause the effect is compared to the same situation without the suspected condition.
16.

A living things that has more than one cell is called _________________________.
17.

The variable that is changed on purpose, also called the independent variable is known as the _______________ variable.
18.

According to the organization of life, what term is after biological molecule (macromolecule), but before cell?
19.

What would be an inference to the picture?