Câu 1: What is science?

A. A sport

B. The study of the natural world

C. A kind of food

D. A movie

Câu 2: What tool helps scientists look at small things?

A. Ruler

B. Microscope

C. Calculator

D. Camera

Câu 3: What do scientists do?

A. Watch TV

B. Study and experiment

C. Dance

D. Sing

Câu 4: What is an experiment?

A. A test to discover something

B. A trip

C. A type of game

D. A drawing

Câu 5: What is gravity?

A. A dance move

B. A type of energy

C. The force that pulls things down

D. A robot

Câu 6: Which planet do we live on?

A. Mars

B. Earth

C. Venus

D. Jupiter

Câu 7: Which of these is a source of light?

A. Moon

B. Mirror

C. Sun

D. Wall

Câu 8: What is matter?

A. A TV show

B. Anything that has mass and takes up space

C. A place

D. A number

Câu 9: Water changes to ice at:

A. 0°C

B. 100°C

C. 50°C

D. 10°C

Câu 10: What do we call water in gas form?

A. Steam

B. Ice

C. Cloud

D. Smoke

Câu 11: What are the three states of matter?

A. Hot, cold, warm

B. Small, big, huge

C. Solid, liquid, gas

D. Light, dark, heavy

Câu 12: What gas do humans need to breathe?

A. Carbon dioxide

B. Helium

C. Oxygen

D. Nitrogen

Câu 13: What organ helps us breathe?

A. Heart

B. Brain

C. Lungs

D. Stomach

Câu 14: What is the center of the solar system?

A. Earth

B. Moon

C. Sun

D. Mars

Câu 15: What does a thermometer measure?

A. Speed

B. Temperature

C. Distance

D. Time

Câu 16: What helps plants make food?

A. Rain

B. Wind

C. Photosynthesis

D. Soil

Câu 17: What do we call animals that eat only plants?

A. Carnivores

B. Omnivores

C. Herbivores

D. Insects

Câu 18: What body system controls the body?

A. Digestive

B. Respiratory

C. Nervous

D. Circulatory

Câu 19: What simple machine helps lift heavy things?

A. Wheel

B. Pulley

C. Rope

D. Spoon

Câu 20: What part of a plant takes in water?

A. Leaf

B. Flower

C. Root

D. Stem

Câu 21: Which planet is known as the Red Planet?

A. Earth

B. Mars

C. Venus

D. Mercury

Câu 22: What causes day and night?

A. The moon

B. Earth's rotation

C. Stars

D. Rain

Câu 23: Which body part helps us think?

A. Heart

B. Brain

C. Lungs

D. Liver

Câu 24: What do magnets attract?

A. Plastic

B. Wood

C. Iron

D. Paper

Câu 25: What is a scientist who studies animals called?

A. Botanist

B. Zoologist

C. Chemist

D. Astronomer

Câu 26: What is the main source of energy for Earth?

A. Fire

B. Moon

C. Sun

D. Oil

Câu 27: Which planet is the largest in our solar system?

A. Saturn

B. Earth

C. Mars

D. Jupiter

Câu 28: What organ pumps blood through the body?

A. Brain

B. Lung

C. Heart

D. Kidney

Câu 29: What is the hardest natural substance?

A. Wood

B. Diamond

C. Stone

D. Ice

Câu 30: What do you call rain, snow, or hail?

A. Evaporation

B. Condensation

C. Precipitation

D. Reflection

Câu 31: What are living things made of?

A. Paper

B. Atoms

C. Cells

D. Gas

Câu 32: What part of the body digests food?

A. Heart

B. Lungs

C. Stomach

D. Brain

Câu 33: What happens when water boils?

A. It freezes

B. It turns to steam

C. It becomes a solid

D. It disappears

Câu 34: What kind of energy does the sun give?

A. Light and heat

B. Wind

C. Sound

D. Water

Câu 35: What do we call animals that eat other animals?

A. Herbivores

B. Carnivores

C. Omnivores

D. Scavengers

Câu 36: What tool is used to measure weight?

A. Thermometer

B. Clock

C. Scale

D. Ruler

Câu 37: What is the change from solid to liquid called?

A. Freezing

B. Melting

C. Boiling

D. Condensation

Câu 38: What part of the plant makes seeds?

A. Stem

B. Leaf

C. Flower

D. Root

Câu 39: What is sound?

A. Movement

B. Light

C. Vibration

D. Temperature

Câu 40: What kind of energy moves cars?

A. Sound energy

B. Solar energy

C. Chemical energy (fuel)

D. Water energy

Câu 41: What does a plant need to grow?

A. Light, water, and air

B. Milk

C. Sugar

D. Heat only

Câu 42: What is rainwater an example of?

A. Gas

B. Solid

C. Liquid

D. Plasma

Câu 43: What organ helps us hear?

A. Nose

B. Eye

C. Ear

D. Hand

Câu 44: What do you call the outer part of Earth?

A. Core

B. Mantle

C. Crust

D. Lava

Câu 45: Which planet has rings around it?

A. Earth

B. Saturn

C. Venus

D. Mars

Câu 46: What happens when you mix red and blue?

A. Green

B. Purple

C. Yellow

D. Brown

Câu 47: What do bees help plants do?

A. Sleep

B. Pollinate

C. Cut leaves

D. Burn

Câu 48: What is a fossil?

A. A type of plant

B. A very old rock

C. Remains of a once-living organism

D. A kind of tree

Câu 49: What is weather?

A. Plants in the air

B. Changes in temperature, wind, and rain

C. Dust

D. The sky color

Câu 50: What protects Earth from too much sunlight?

A. Moon

B. Water

C. Ozone layer

D. Air

Câu 51: What is the main gas in the air we breathe?

A. Carbon dioxide

B. Nitrogen

C. Hydrogen

D. Oxygen

Câu 52: Which tool is used to see distant objects in space?

A. Microscope

B. Calculator

C. Telescope

D. Camera

Câu 53: What happens to shadows when the sun is high in the sky?

A. They disappear

B. They become longer

C. They become shorter

D. They move fast

Câu 54: What is the process of water turning into vapor?

A. Condensation

B. Evaporation

C. Freezing

D. Melting

Câu 55: What helps birds fly?

A. Fins

B. Wings

C. Legs

D. Tails only

Câu 56: What does the digestive system do?

A. Control thinking

B. Pump blood

C. Break down food

D. Help breathing

Câu 57: What is energy?

A. Food

B. The ability to do work

C. Light

D. Heat only

Câu 58: What is a chemical change?

A. A change that can be reversed

B. A change in color only

C. A change that forms a new substance

D. A change in shape only

Câu 59: What kind of animal lays eggs and has feathers?

A. Mammal

B. Bird

C. Reptile

D. Fish

Câu 60: What part of the eye lets light in?

A. Retina

B. Iris

C. Pupil

D. Cornea