Use the data table on observations made by students .Which statement is a testable hypothesis?

d. If startled then frogs will jump into the water.

In a investigation amount of water to plants was changed which hypothesis was tested?

Amount of water increases rate of photosynthesis.

What conclusion is best supported by the graph shown?

Risk of Down syndrome increases from mothers after age 34.

In a controlled experiment, which of this statement will be the correct conclusion of the data?

c.Fertilizers provide nutrients and make plants taller.

In effect of chemicals on apple yields, which is the experimental group in the experiment?

The second orchard sprayed with the chemical.

2. In a controlled experiment, in the data shown which of these is being tested ?

c. Plant height in the given two conditions

In effect of chemicals on apple yields, which is the control group in the experiment?

The first orchard not sprayed with chemical.

In a controlled experiment shown, which of this will be the correct analysis of the data?shown

d. Height increase was 3.8cms in B and 2.6 cms in A.

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AP bio Scientific method

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Preassessment quiz on scientific Method

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Questions 10

Answers

1
Use the data table on observations made by students .Which statement is a testable hypothesis?
c. If given more food, fish will be happier.
b. Water is an abiotic component in the pond ecosystem.
d. If startled then frogs will jump into the water.
a. The frogs living in the pond represent a population.
2
In a investigation amount of water to plants was changed which hypothesis was tested?
Amount of water increases rate of cellular respiration.
Amount of nutreints increases rate of photosynthesis.
Amount of water increases rate of photosynthesis.
Amount of light increases rate of photosynthesis.
3
What conclusion is best supported by the graph shown?
Risk of Down syndrome increases from mothers after age 34.
The risk of Down syndrome doubles from after age of 34.
No correlation between Down syndrome births and mothers age
No risk of Down syndrome in children from mothers under 34.
4
In a controlled experiment, which of this statement will be the correct conclusion of the data?
b. Fertilizers are a must for plant growth.
a. Plants grow as tall in water as in fertilizer.
d. Water alone is not good for plant growth.
c.Fertilizers provide nutrients and make plants taller.
5
In effect of chemicals on apple yields, which is the independent variable ?
The first orchard sprayed with water.
The second orchard sprayed with chemical.
The chemical sprayed.
The number of apples from both orchards.
6
In effect of chemicals on apple yields, which is the experimental group in the experiment?
The number of apples in both the orchards.
The number of apples in both the orchards.
The first orchard sprayed with the water.
The second orchard sprayed with the chemical.
7
2. In a controlled experiment, in the data shown which of these is being tested ?
d. Number of days the plants will grow
b. Effect of fertilizer on plant height
a. Effect of water on plant height
c. Plant height in the given two conditions
8
In effect of chemicals on apple yields, which is the control group in the experiment?
The number of apples from both orchards.
The second orchard sprayed with chemical.
The chemical sprayed on the orchards.
The first orchard not sprayed with chemical.
9
In a controlled experiment shown, which of this will be the correct analysis of the data?shown
b. Plant height was lowest on the first day in A and B.
a. Height of plants increases in fertilizer.
c. Plant height increased slowly but steadily in A only.
d. Height increase was 3.8cms in B and 2.6 cms in A.
10
If a theory is challenged by new evidence, which of the following could occur?
A vote is taken on whether to accept the new evidence
The theory is accepted, not the evidence
The evidence is wrong
The theory could be altered

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