Heat
What are the three ways in which heat can travel?
Conduction, convection, radiation
What are the names of the four processes by which heat can cause a change in the state of matter?
Light travels in __________ lines.
straight
Which two processes cause light to change direction?
What are the three Rs?
Reduce, reuse, recycle.
Explain how conductors and insulators are different.
Conductors are materials that transfer thermal energy easily.
Insulators don't.
solidification
If we put an opaque object in front of light, we can see what?
A shadow
Which types of surfaces reflect light better?
Give two examples.
Smooth surfaces, such as glass, metal, the surface of a body of water, etc.
Explain sustainable development.
Development that doesn't cause permanent damage to the environment, so we can continue using resources in the future.
Explain conduction.
100 BONUS POINTS if you can include the word molecules in your explanation.
Conduction occurs when tow objects are in contact and heat transfers from one object to the other.
BONUS: the molecules in the hotter object are moving faster and pass their energy when they hit the colder object.
When a gains thermal energy and the molecules move more quickly and separate from each other, ___________ occurs.
evaporation
Why do shadows have the same shape as their object?
Because the light that is not blocked by the object travels in straight lines.
Explain refraction.
Explain the difference between a food chain and a food web.
A food chain shows the trophic relationships between organisms in different trophic groups.
A food web shows all the different food chains in an ecosystem.
In which ways can heat affect an object?
Heat can make objects expand or move.
Heat can change the state of matter.
Thermal energy causes the molecules in a solid, liquid, or gas to do what?
vibrate
Explain transparent, translucent, and opaque.
Transparent objects do not block light.
Translucent objects block some light.
Opaque objects block light completely.
What is white light?
It is made of all of the colors combined together.
What are the six groups of invertebrates?
porifera, molluscs, cnidarians, arthropods, annelids and echinoderms
How are heat and temperature different?
Temperature is the amount of thermal energy.
Aside from changes in state, heat can cause which two things?
expansion and chemical changes
Name two ways in which we use light energy.
Examples can include:
light from the sun to see/produce electrical energy
light from artificial sources to see at night
light to indicate when a machine is operating
Order these words from the most basic to the most complex:
body systems, tissues, cells, organs
cells, tissue, organs, body systems