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WorksheetsQuiz-a-Day Challenge (Days 8) - Grade 8
Total questions: 24
Worksheet time: 4mins
Name
Class
Date
1.
Which type of cell has a nucleus?
a)
A) Prokaryotic cell
b)
B) Eukaryotic cell
c)
C) Both prokaryotic and eukaryotic cells
d)
D) Neither prokaryotic nor eukaryotic cells
2.
What is the function of the mitochondria in a eukaryotic cell?
a)
A) To produce energy for the cell
b)
B) To store genetic information in the cell
c)
C) To transport materials in and out of the cell
d)
D) To provide shape and support to the cell
3.
What is the function of ribosomes in a cell?
a)
A) To produce energy for the cell
b)
B) To store genetic information in the cell
c)
C) To transport materials in and out of the cell
d)
D) To synthesize proteins for the cell
4.
Which of the following is an example of a prokaryote?
a)
A) Bacteria
b)
B) Human skin cell
c)
C) Plant cell
d)
D) Fungal cell
5.
Which of the following is NOT a greenhouse gas?
a)
A) Carbon dioxide
b)
B) Methane
c)
C) Oxygen
d)
D) Water vapor
6.
How does carbon enter the atmosphere during the carbon cycle?
a)
A) Through photosynthesis
b)
B) Through respiration
c)
C) Through volcanic activity
d)
D) Through ocean currents
7.
Which of the following is an example of carbon sink?
a)
A) Ocean
b)
B) Forest
c)
C) Atmosphere
d)
D) Desert
8.
What is the primary source of carbon for plants during photosynthesis?
a)
A) Air
b)
B) Water
c)
C) Soil
d)
D) Sunlight
9.
Which of the following is a characteristic of a solution?
a)
A) It is made up of two or more substances that are chemically combined
b)
B) It has particles that are evenly distributed throughout the mixture
c)
C) It has particles that settle out over time
d)
D) It is a mixture that has a cloudy appearance
10.
Which of the following is an example of a colloid?
a)
A) Blood
b)
B) Salt water
c)
C) Soda water
d)
D) Distilled water
11.
What is the Tyndall effect?
a)
A. The scattering of light by particles in a colloid
b)
B. The absorption of light by particles in a colloid
c)
C. The reflection of light by particles in a colloid
d)
D. The refraction of light by particles in a colloid
12.
What is the difference between a colloid and a suspension?
a)
A. Colloids are mixtures of two or more substances, while suspensions are a single substance.
b)
B. Colloids have larger particles than suspensions.
c)
C. The particles in colloids are evenly distributed, while in suspensions they settle out.
d)
D. Colloids are homogeneous, while suspensions are heterogeneous.
13.
What is the difference between a mixture and a compound?
a)
A) A mixture is made of two or more elements while a compound is made of two or more substances.
b)
B) A mixture is a homogeneous combination of two or more substances while a compound is a heterogeneous combination of two or more substances.
c)
C) A mixture is a heterogeneous combination of two or more substances while a compound is a homogeneous combination of two or more substances.
d)
D) There is no difference between a mixture and a compound.
14.
What is an element?
a)
A) A substance that is made of two or more different elements that are chemically bonded together.
b)
B) A substance that is composed of atoms that have the same number of protons in their nuclei.
c)
C) A homogeneous mixture of two or more substances.
d)
D) A substance that is composed of atoms that have different numbers of protons in their nuclei.
15.
Which of the following elements is a metal?
a)
A) Carbon
b)
B) Helium
c)
C) Sodium
d)
D) Chlorine
16.
What is the most common element in the Earth's crust?
a)
A) Oxygen
b)
B) Carbon
c)
C) Iron
d)
D) Silicon
17.
Which of the following is a compound?
a)
A) Gold
b)
B) Water
c)
C) Copper
d)
D) Oxygen
18.
Which of the following elements is a halogen?
a)
A) Sodium
b)
B) Chlorine
c)
C) Calcium
d)
D) Iron
19.
What is the atomic number of oxygen?
a)
A) 6
b)
B) 8
c)
C) 16
d)
D) 22
20.
Which of the following is not a primary consumer in a food chain?
a)
A) Grasshopper
b)
B) Mouse
c)
C) Hawk
d)
D) Rabbit
21.
What is the chemical formula for water?
a)
A) H2O2
b)
B) NaCl
c)
C) CO2
d)
D) H2O
22.
Which of the following is a heterogeneous mixture?
a)
A) Sugar dissolved in water
b)
B) Air
c)
C) Milk
d)
D) Lemonade
23.
What is the atomic number of carbon?
a)
A) 6
b)
B) 8
c)
C) 16
d)
D) 22
24.
Which of the following is not an element?
a)
A) Gold
b)
B) Silver
c)
C) Water
d)
D) Oxygen
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