Name: _________________________ Yr. & Sec.: _____________________ Score: _______
Test I. MULTIPLE CHOICE
Direction: Read each item carefully and encircle the letter of the correct answer.
1. 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 five months. What is the
constant in this experiment?
a. Plant height c. corn with fertilizer
b. Corn without fertilizer d. amount of water
2. A student decides to set up an experiment to see if the detergent affects the growth of
seeds. He sets up 10 seeds up. Five of the seed pots will receive a small amount of detergent
in the soil and will be placed in the sun. The other five seed pots will not receive detergent
and will be placed in a shade. All 10 seed pots will receive the same amount of water, the
same number of seeds, and the same type of seeds. He grows the seeds for two months and
charts the growth every 2 days. What is wrong with his experiment?
a. More than one variable is being tested
b. The student should have a larger number of pots
c. There is no way of measuring the outcome
d. There is no control set-up
3. A scientific study showed that the depth at which algae were found in a lake varied from
day to day. On clear days, the algae were found as much as 6 meters below the surface of
the water but were only 1 meter below the surface on cloudy days. Which hypothesis best
explains these observation?
a. Nitrogen concentration effects the growth of algae
b. Precipitation affects the growth of algae
c. Light intensity affects the growth of algae
d. Wind currents affect the growth of algae
4. When the students wants to find out what cause the death of fishes on the pond he/she
must
a. Observe further the fish in the pond
b. Know whether the water is polluted or not
c. Know what kind of fish can live in the pond
d. Plan an experimentation to find out what causes the death of fishes
5. When the scientist recorded the weight of a sample fish taken everyday for 28 days. What
were they doing?
a. Gathering data c. Designing an experiment
b. Making a conclusion d. Formulating a hypothesis
For Nos. 6-9. Read the short story carefully and determine what step of the scientific method is
being described.
In 1982 Alexander Fleming was studying Straphylococcus bacteria in a London hospital. He
grew bacterial colonies in culture dishes. One of the dishes became accidentally contaminated
with a green mold. He isolated the molds and conducted experiments. He found out that the
molds produced a substance that could kill many kinds of bacteria, infecting humans. He
published his scientific report announcing the discovery of penicillin.
6. Fleming prepared two (2) set-ups in his experiments, the control and experimental set-ups.
He was
a. Formulating a hypothesis c. Performing an experiment
b. Analyzing and collecting date d. Making a conclusion
7. Fleming’s observations and data were noted down and interpreted
a. Making conclusion c. Formulating a hypothesis
b. Stating a problem d. Analyzing and interpreting data
8. Fleming thought that maybe the mold secreted a substance that caused the death of
bacteria
a. Formulating a hypothesis c. Stating the problem
b. Designing an experiment d. Making a conclusion
