Vocabulary
What is the smallest building block of matter?
Atom/Particle
H₂
Element
Heat flows from ___ to ___ areas.
Hot to cold
What energy source powers the solar cooker?
Solar/Light Energy
If temperature decreases, particle movement ___.
Decreases
What word describes 2 or more atoms chemically bonded?
Molecule
Water (H₂O)
Compound Molecule
Melting is caused by an increase in what type of energy?
Kinetic Energy
Describe the 4 Stages of the flow of energy in the solar cooker.
Sun → reflective panel → black box → pot
When KE decreases, chocolate becomes a ___.
Solid
What type of matter has a definite shape and volume composition?
Solid
Particles not bonded
Mixture
What state of matter does particles move the fastest?
Gas
What does the glass cover do?
Traps the heat
Why does chocolate melt at higher KE?
Particles move faster & spread apart
What term means the energy of motion of particles?
Kinetic energy
Why is a mixture NOT a pure substance?
Because composition is not fixed; can separate physically
Solid, because the particles are closer together.
If we remove the insulator, what happens to cooking?
It would trap less heat and cook slower.
What does the chemical pack do when squeezed?
Absorbs or releases energy
What type of material slows thermal energy transfer?
Insulator
How many atoms are in H₂O?
3
When a ball hits the floor, what does the KE transfer into?
Heat/sound energy
Why is the inside painted black?
Black absorbs more radiant energy
If the pack RELEASES energy, how does that affect chocolate?
KE increases → chocolate softens