GRADE 8 Pre - Test Go
TERM 1 TEST
Gorroto booka
MARKS: 35
PHOTOSYNTHESIS AND RESPIRATION [8 MARKS]
1. Complete the following sentences from the list of possible words. Rewrite the sentence and
underline the chosen words.
energy; oxygen; glucose; respiration; carbon dioxide
a. I breathe because I need
from the air for
b. This process releases from
c. The waste product I breathe out is ​

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?