STAAR Grade 5: Science 1 — Questions and Answers
Question 1: What is the process by which plants make their own food using sunlight?
- Respiration
- Photosynthesis (Correct answer)
- Transpiration
- Decomposition
Correct answer: Photosynthesis
Photosynthesis is the process plants use to convert sunlight, water, and carbon dioxide into food (glucose) and oxygen.
Question 2: Which layer of Earth is made of liquid rock called magma?
- Crust
- Mantle
- Inner core
- Outer core (Correct answer)
Correct answer: Outer core
The outer core is made of liquid iron and nickel, while the mantle contains magma (molten rock).
Question 3: What type of rock forms when magma cools and hardens?
- Sedimentary
- Metamorphic
- Igneous (Correct answer)
- Limestone
Correct answer: Igneous
Igneous rock forms when magma or lava cools and solidifies.
Question 4: What happens to water when it evaporates?
- It freezes into ice
- It turns into water vapor (Correct answer)
- It becomes a solid
- It combines with oxygen
Correct answer: It turns into water vapor
Evaporation is the process where liquid water changes into water vapor (gas) as it absorbs heat energy.
Question 5: Which adaptation helps a cactus survive in the desert?
- Large, broad leaves
- Thick waxy skin to store water (Correct answer)
- Long roots that stay near the surface
- Hollow stems that collect rain
Correct answer: Thick waxy skin to store water
Cacti have thick, waxy stems that store water, helping them survive long periods without rain.
Question 6: What is the main function of the circulatory system?
- To digest food
- To filter waste from the blood
- To transport blood throughout the body (Correct answer)
- To support the body's frame
Correct answer: To transport blood throughout the body
The circulatory system's main function is to pump and transport blood, nutrients, and oxygen throughout the body.
STAAR Grade 5: Science 1
What is the process by which plants make their own food using sunlight?