NEW
Font size
WorksheetsLQA BIOLOGY 8 THIRD TERM
Total questions: 22
Worksheet time: 2hrs 50mins
1) A liquid is determined to be an acid or base depending on the type of ____ in the liquid.
A Protons
B) Ions
C) Elements
D) Neutrons
2) What is the pH scale?
A) A method for measuring the protons in a solution
A measurement of how acidic or basic a liquid is
A special microscope used to look at acids
None of the Above
3 What measurement of the pH scale is considered a neutral liquid?
0
3
7
A) 9
What is rate of reaction?
A) How big a reaction is
How much gas a reaction produces
How loud a reaction is
How fast a reaction is
What is required for a reaction to occur?
A) Collisions
Sufficient Energy
Collisions with sufficient energy
c Nothing
5 What does NOT happen when the temperature is increased?
A) Increases the rate of reaction
b Increases the concentration of the reaction
c Stabilises a reaction
d More particles collide in the correct orientation
In an exothermic reaction, heat is ...
A) taken in
given out
break out
A) speed out
The amount of a substance in a given volume.
Concentration
surface area
catalyst
temperature
9 In an exothermic reaction the products have
A) more energy than the reactants
b the same energy as the reactants
less energy than the reactants
A) no energy
10) How heavy an object is for its size it its______?
A) Volume
b) Mass
c) Density
d) Shape
The density if ice is ______ than the density of water, which causes it to
A) More, Suspend
b) More, Float
c) Less, Sink
d) Less, Float
12) ______ is the amount of space an object takes up
A) Weight
b) Mass
c Volume
A) Density
13) Mass per unit volume is ______
A) Volume
b) Mass
c) Shape
Density
14) What number do you get if you neutralise pH 1 - pH 14 ?
A) pH 9
b) pH 6
c) pH 4
d) pH 7
15) Which factors decrease the rate of a reaction?
A) adding a catalyst
b) increasing surface area
c) increasing concentration
decreasing the temperature
16) Products will form faster if____________
A) the particle size of the reactants are larger
b) temperature is decreased.
concentration of the reactants are increased.
A) the reaction is not stirred.
What does the "B" in the volume formula V = B x h stand for?
Bottom of the object
Between
Box
Area of the base
Find the volume
22 yd3
121 yd3
55 yd3
330 yd3
Find the volume of the figure. Round to the nearest tenth.
80 cm³
80 cm2
40 cm²
40 cm³
Find the volume:
240 cm 3
960 cm 2
1920 cm 3
960 cm 3
A fish-tank has a length of 45 centimeters, a width of 25 centimeter and a depth of 10 centimeter. Find the volume of the fish-tank.
10250 cm3
11250 ft3
11250 cm3
10250 ft3
Find the volume of the cylinder.
4239
1696
1130
565
