Questions & Answers
Browse all 25 questions from the
Elementary Science Mastery Challenge study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which of the following is the smallest unit of matter that retains the properties of an element?
-
A
Molecule
-
B
Compound
-
C
Atom
-
D
Ion
2
Photosynthesis, the process plants use to convert light energy into chemical energy, primarily takes place in which organelle?
-
A
Mitochondria
-
B
Nucleus
-
C
Ribosome
-
D
Chloroplast
3
The Earth's magnetic field is generated by the movement of molten iron in which layer of the Earth?
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A
Crust
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B
Mantle
-
C
Inner Core
-
D
Outer Core
4
When a solid directly turns into a gas without becoming a liquid, this phase change is called:
-
A
Evaporation
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B
Melting
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C
Condensation
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D
Sublimation
5
What is the primary function of red blood cells in the human body?
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A
Fighting infection
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B
Clotting blood
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C
Transporting oxygen
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D
Producing antibodies
6
Which planet in our solar system is known for its prominent rings, primarily made of ice particles?
-
A
Jupiter
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B
Uranus
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C
Neptune
-
D
Saturn
7
The process by which water vapor in the air cools and changes back into liquid water, forming clouds, is called:
-
A
Evaporation
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B
Precipitation
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C
Transpiration
-
D
Condensation
8
What force keeps planets in orbit around the Sun and the Moon in orbit around the Earth?
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A
Electromagnetism
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B
Nuclear Force
-
C
Gravity
-
D
Friction
9
Which type of rock is formed from the cooling and solidification of molten rock (magma or lava)?
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A
Sedimentary
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B
Metamorphic
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C
Igneous
-
D
Crystalline
10
The observable change in the position of an object over time is called:
-
A
Acceleration
-
B
Velocity
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C
Speed
-
D
Motion
11
What gas do humans and animals exhale during respiration, which plants then use for photosynthesis?
-
A
Oxygen
-
B
Nitrogen
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C
Carbon Dioxide
-
D
Helium
12
The outermost layer of the Earth, on which we live, is known as the:
-
A
Mantle
-
B
Core
-
C
Lithosphere
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D
Asthenosphere
13
Which of the following is a vertebrate animal that breathes air using lungs and has a backbone?
-
A
Fish
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B
Insect
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C
Amphibian
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D
Jellyfish
14
What is the unit of electrical resistance?
-
A
Ampere
-
B
Volt
-
C
Watt
-
D
Ohm
15
The process of a seed developing into a new plant is called:
-
A
Fertilization
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B
Pollination
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C
Germination
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D
Sprouting
16
Which part of a plant is responsible for absorbing water and nutrients from the soil?
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A
Stem
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B
Leaf
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C
Flower
-
D
Root
17
The bending of light as it passes from one medium to another is known as:
-
A
Reflection
-
B
Diffraction
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C
Refraction
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D
Absorption
18
Which of the following is a non-renewable energy source that is formed from the remains of ancient organisms?
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A
Solar energy
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B
Wind energy
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C
Fossil fuels
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D
Hydropower
19
What is the process by which living things produce offspring that are similar to themselves?
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A
Metabolism
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B
Evolution
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C
Reproduction
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D
Adaptation
20
The study of living organisms and their interactions with each other and their environment is called:
-
A
Geology
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B
Astronomy
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C
Biology
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D
Chemistry
21
Which of the following is a common characteristic of all living things?
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A
They have fur
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B
They breathe oxygen
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C
They grow and develop
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D
They have bones
22
The process of heat transfer through direct contact is called:
-
A
Convection
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B
Radiation
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C
Conduction
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D
Insulation
23
Which celestial body orbits the Earth?
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A
Sun
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B
Mars
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C
Moon
-
D
Venus
24
What is the basic unit of heredity that is passed from parents to offspring?
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A
Cell
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B
Protein
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C
Gene
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D
Organelle
25
When an object is pushed or pulled, this is an example of a:
-
A
Wave
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B
Energy
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C
Force
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D
Current
