Life Science
What is the basic unit of life?
Cell
What is matter made of?
atoms
What causes day and night?
Earth's rotation
What do engineers do?
Design and build things to solve problems.
What do we call an educated guess in science?
Hypothesis
What do plants need to perform photosynthesis?
sunlight, water, and carbon dioxide
Name the three states of matter.
solid, liquid, and gas
Which rock type forms directly from Magma?
Igneous
What is a model in science?
A representation of something too big, small, or complex to study directly.
What is a variable in an experiment?
A factor that can change .
Which part of a plant takes in water from the soil?
the root
What force slows objects down on a surface?
Friction
What layer of Earth is responsible for our magnetic field?
The outer core
Why do scientists repeat experiments?
To make sure their results are accurate and reliable.
I bribe one class with candy to see if it will improve test scores. I give the same test without candy to another class. In this experiment, what is the experimental group?
The class offered candy
What body system helps you breathe?
the respiratory system
What is it called when a gas turns into a liquid?
condensation
Why do we have seasons on Earth?
Earth's tilt on its axis makes our hemisphere point directly towards or away from the sun, giving direct or indirect heat energy
What is a constraint in engineering?
A limit or restriction, such as time, materials, or cost.
I bribe one class with candy to see if it will improve test scores. I give the same test without candy to another class. In this experiment, what is the dependent variable?
test scores
Name two ways animals adapt to cold environments.
Ex: growing thick fur and hibernating
Why does a metal spoon feel colder than a wooden spoon?
Because metal is a better conductor of heat.
What causes volcanoes, mountains, and earthquakes to occur/exist?
Convection currents in the Earth's mantle creating plate boundaries.
How does technology affect the environment both positively and negatively?
It can solve problems (like clean energy) but also cause harm (like pollution or habitat destruction).
What is the difference between a theory and a hypothesis?
A hypothesis is a testable guess; a theory is a well-tested explanation based on evidence.