Science Pre-Assessment

1.

1 point

A student wishes to test the hypothesis that adding antifreeze to water lowers the freezing point of the water. What would be the dependent (responding) variable?

amount of antifreeze added to the water

type of thermometer used to measure the freezing point

the amount of water put into a container

temperature at which the water/antifreeze mixture freezes

2.

1 point

Asexual reproduction involves only one parent. The offspring of this type of reproduction have

DNA identical to the DNA of the parent

one-half of the DNA of the parent

DNA that is different from the parent

DNA that is incomplete

3.

1 point

A student predicts that more sugar will dissolve in warm water than in cold water. She puts some water in a container, adds sugar, and then stirs. The amount of undissolved sugar is then observed. When this student repeats the experiment to verify her prediction, the only thing that should change is the

temperature of the water

amount of time stirring

amount of water used

amount of sugar used

4.

1 point

Each student in a science class of 25 conducts the same experiment. One student gathers all the data from her classmates and summarizes the results of the experiment for the class. She compares the data she personally recorded with the class data. Which of these might indicate to her that her results are valid?

Three other classes performed the same experiment.

Many other students recorded data similar to hers.

The same experiment was repeated two years in a row.

Another student in her class reached a different conclusion.

5.

1 point

Most of the hereditary information within the cell is carried in the

ribosomes

vaculoes

chromosomes

Golgi bodies

6.

1 point

Sponges are classified as animals because they cannot

catch their own food

get rid of waste products

move from place to place

make their own food

7.

1 point

Plants release oxygen into the air as a result of photosynthesis. Which of these do plants need for photosynthesis?

methane

nitrogen

hydrogen

carbon dioxide

8.

1 point

Which type of characteristics can be inherited?

those caused by accidents

those produced by exercise

those produced by diet

those controlled by genes

9.

1 point

One way plants and animals are alike is that they both

use oxygen

use carbon dioxide

make their own food

move to get their food

10.

1 point

Which of the following do typical plant cells have that typical animal cells do not?

cytoplasm

mitochondria

choloroplasts

nuclei

11.

1 point

Ellen noticed that she often sneezes when she visits her friend Robert, who has a cat and a parrot. Ellen wonders if she may have allergies to Robert's pets and decides to conduct a scientific investigation. What should Ellen do next?

Ellen should tell Robert that she cannot visit him until he gives away his pets.

Ellen should call her doctor and insist that she needs shots for allergies.

Ellen should visit Sue who has a horse, a dog, a goldfish, and a hamster.

Ellen should visit a friend who has only cats and one who has only parrots.

12.

1 point

Human sweat is the direct result of which life functions?

respiration and cellular growth

reproduction and cellular transport

digestion and disease prevention

waste removal and temperature control

13.

1 point

A student conducted an experiment on plant growth that required adding about one cupful of liquid fertilizer to several plants each week. In order to accurately measure the fertilizer given to each plant, the fertilizer volume should be measured in

cubic feet

cubic meters

milliliters

kiloliters

14.

1 point

A new medication dissolves blood clots. However, if too much is used, excessive bleeding occurs. Which method should scientists use to determine the best dosage of this new medication?

use people of many different ages as test subjects

vary only the dosages of the medication while keeping everything else constant

change the times the medication is given to determine if timing affects bleeding

have the test subjects eat a wide variety of foods with the medications

15.

1 point

Which of these shows the correct sequence of development?

cells - tissues - organs - systems

organs - cells - tissues - systems

tissues - cells - systems - organs

systems - tissues - cells - organs