GED Science Test #4

Question 1

A student hypothesizes that ingesting a teaspoon of raw honey will keep pollen-allergic people from sneezing. She conducts an experiment to verify her theory. What's the name of the dependent variable?

Accepted Answer

Sneezing

Answer

In a scientific experiment, an independent variable is a variable that is altered or manipulated in order to assess the effects on the dependent variable. In this scenario, the student is in charge of the honey to see how it affects sneezing. Because it "depends" on the independent variable, it is called dependent.

Question 2

Plants and animals can be breed to have useful characteristics. Humans can alter an organism's genotype by choosing which animals are permitted to breed. What did Dave call this type of evolution in organisms?

Accepted Answer

Artificial selection

Answer

To distinguish this process from natural selection, Dave coined artificial selection. Natural selection is how desirable features in living organisms create the most offspring. Natural selection causes changes in the features of living things over time, as creatures that are best suited for reproduction are more likely to pass on their genes than organisms that are less well suited. On the other hand, Artificial selection is the reproduction of organisms with advantageous characteristics as a result of human influence. Natural selection is described by the phrase "survival of the fittest," while hybridism refers to a creature of mixed origin that isn't necessarily bred to have desirable qualities.

Question 3

In 1957, which country launched the first satellite into space?

Accepted Answer

Russia

Answer

Germany pioneered rocket technology, and the United States became the first country to land a man on the moon in 1969.

Question 4

In a chemical experiment, 1025 milliliters of water are combined with 175 milliliters of motor oil in a beaker.
1000 milliliters Equals 1 liter
How many liters of liquid remains in the beaker after adding the water?

Accepted Answer

1.2

Answer

To begin, combine the two liquids:
1200 mL = 1025 + 175 mL
Divide by 1000 to convert milliliters to liters:
1200 ÷ 1000 = 1.2 L

Question 5

The type of light used in a lab experiment to measure the rate at which plants grow under artificial light is which type of variable?

Accepted Answer

Independent

Answer

An independent variable is a factor that the scientists have control over in an experiment. The output or effect is represented by a dependent variable. The light is an independent variable because it is controlled by the experimenters.

GED Practice Test

GED Practice Test

GED Science Test #4