Nature of Science
What is an observation?
Using your senses to gather information about something.
When water freezes, it is in which state of matter?
Solid.
What happens when you rub your hands together quickly?
They feel warm because friction produces heat.
Sound and Mechanical Energy
How does light travel?
In a straight line until it hits an object.
What is an investigation?
A planned process to answer a question or test an idea.
What happens when water boils?
(Evaporations) It turns into water vapor.
What is friction?
A force that slows motion between two objects.
Name the forms of energy.
Light, heat, sound, electrical, mechanical (energy of motion).
What happens when light enters water from air?
It bends (refracts).
What is an inference?
A conclusion or explanation based on observations.
What is condensation?
When water vapor turns back into liquid.
Friction produces which form of energy?
Heat energy
Give an example of energy creating change.
Heat melting ice.
What is reflection?
Light bouncing off a surface like a mirror.
How are observations and inferences different?
Observations are what you see or measure; inferences are what you think based on those observations.
Why does condensation form on a cold glass?
Water vapor cools and changes state.
Give an example of heat energy.
Fire, The Sun, An Oven.
Energy has the ability to...
cause motion or create change.
What is refraction?
Light bending when it passes through different materials.
Why do scientists create explanations after investigations?
To make sense of observations and evidence.
How does cooling water turn it into ice?
Heat is removed, lowering the temperature below freezing.
How can you investigate friction?
Rub different materials together and measure temperature change.
What produces both light and heat energy?
The sun
What happens when light is blocked and cannot pass through an object?
The object casts a shadow.