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Copyright © 2014 Edmentum - All rights reserved.
Generation Date: 12/19/2014
Generated By: Cheryl Shelton
Title: Grade 8 Blizzard Bag 2014-2015 Science-Day 1
1. Menthol is an organic compound that can be made synthetically or extracted from peppermint
or other mint oils. Substances that contain menthol can often be distinguished by its unique
smell.
What would be the safest way to smell unknown compounds to check for the presence of
menthol?
A. Pour the substance into a petri dish under a fume hood.
B. Waft the substance's fumes toward you with your hand.
C. Hold the substance under your nose and inhale.
D. Freeze the substance and smell the solid form.
2. Justin collected some pond scum from three ponds and made a bar graph of the organisms in
the ponds.
Which pond has the highest percentage of paramecia of all of the ponds?
A. Pond 1 has the highest percentage of paramecia.
B. Pond 2 has the highest percentage of paramecia.
C. Pond 3 has the highest percentage of paramecia.
D. Ponds 1, 2 and 3 have the same percentage of paramecia.
3. A prediction is a forecast about what may happen in some future situation. An inference is an
explanation based on observations and background knowledge. Based on these definitions,
which of the following statements is a prediction?
A. The stove was hot because the kitchen light was on too long.
B. Adding heat will cause a balloon filled with air to expand.
C. Heat from the Sun caused bubbles to form on a pond surface.
D. A balloon popped because it was filled with too much air.
4. Joseph counted all of the different trees in the woods near his house. He made a graph
showing his results.
Which of the following conclusions can Joseph draw from his graph?
A. There are more elms than oaks in the woods near his house.
B. Cedars are the tallest trees in the woods near his house.
C. Maple trees are not able to grow in the woods near his house.
D. There are 95 trees in the woods near his house.
5. Dr. Grey performed an experiment to test how temperature affects activity levels in mice. She
put one group of mice in a cold environment and another group of mice in a hot environment.
Everything else about the two environments was the same, including the type and amount of
food and water. She allowed the experiment to last for a few generations of mice and tested the
activity levels of the different groups.
There was no change in the activity levels of the mice, but she noticed that the mice in the cold
environment had much darker, thicker fur than the mice in the hot environment. What scientific
question could she ask based on her results?
A.
B.
C.
D.
Does temperature have an effect on fur color and thickness in mice?
Do the mice in the cold environment run faster than the mice in the hot environment?
Does food type have an effect on fur color and thickness in mice?
Which group of mice is the most attractive?
6. Derek lives in a hot, humid climate. He has two rose bushes in pots in his yard. The rose
bushes grow quickly and bloom with large, red roses. Derek moves to a cold, dry climate at the
same altitude and notices that his rose bushes stop growing and do not have large blooms. He
hypothesizes that the rose bushes are not receiving enough water because he is now in a dry
climate. He waters them more often, but they do not improve.
Which of the following scientific questions should he ask next to find out what is wrong with his
roses?
A. Which rose bush has larger, more colorful blooms?
B. Does temperature affect the growth of the rose bushes?
C. How much do rose bushes cost in his new area?
D. Do rose bushes grow better in high or low altitudes?
7. Everyone in Mrs. Blaylock's science class must perform an experiment for the science fair this
year. To begin this process, Mrs. Blaylock asks her students to brainstorm four different
questions that they could study.
One of Mrs. Blaylock's students writes down the following questions.
1. How does the mass of a toy car affect its speed down a ramp?
2. How does the position of the Sun, moons, planets and stars affect a person's personality
traits and daily behavior patterns?
3. Which type of pan - copper, aluminum, or glass - heats up the quickest?
4. Which type of chemicals can remove the cell wall of a plant cell?
Which of the above questions cannot be answered through a scientific investigation?
A. question 4
B. question 3
C. question 1
D. question 2
8. Sean enjoys studying the stars. He used a photometry tool to calculate several stars' apparent
magnitudes (how bright a star looks in the sky). He then researched the stars' distances from
Earth. He recorded his results in the table below.
Star
Apparent Distance from
Magnitude
Earth
Sirius A
-1.47
8.6 light-years
Alpha Centauri A
-0.01
4.4 light-years
Rigel
0.12
770 light-years
Procyon
0.34
11 light-years
Alpha Centauri B
1.33
4.4 light-years
What conclusions can Sean draw from his chart?
A. A star's apparent magnitude is not directly related to its distance from Earth.
B. A star's apparent magnitude decreases as its distance from Earth increases.
C. A star's apparent magnitude increases as its distance from Earth increases.
D. A star's apparent magnitude decreases if it is very close to another star.
9. Before using glassware in the lab, it is important to _______.
A.
B.
C.
carefully inspect the glassware for cracks and chips
know the location of the classroom broom, dustpan, and broken glassware container
make sure that the glassware is clean and dry
D. all of these
10. Which of the following is a lab safety device consisting of a fire-retardant material that can
be thrown over a small fire to smother it?
A. an apron
B. a fire blanket
C. a hot plate
D. a fire extinguisher
11. Susie is conducting an investigation to find out what type of fish are in two ponds near her
house. The results are shown in the bar graph below.
How many more perch are in Pond 2 than Pond 1?
A. 10
B. 5
C. 8
D. 30
12. Tim and Jim finished their lab experiment earlier than their classmates. What should they do
while they wait for the others to finish?
A.
B.
C.
D.
look over their answers to the lab questions and check for errors
grab a snack out of their backpacks and eat it in the lab area
look for an interesting experiment in their lab manual and perform that experiment
bring their math textbooks to the lab area and finish tonight's homework
13. What is the most important laboratory procedure to follow before entering the lab area?
A.
B.
Make sure you know where your lab station is located and with whom you are working.
Come prepared for lab with a pencil, paper, and a calculator, if necessary.
Know the location of any stock solutions or general supplies that will be needed for the
C. lab.
D.
Read the directions thoroughly and make sure you are familiar with safety issues.