6th Grade Quarter 2 Study Guide Answer Key
1. A physical property of a substancecan be observed without changing the identity of the substance.
2. Fill in the chart
Physical Properties / Chemical Propertiesshape / burning
color / Rusting
size / Ripening
mass / Tarnishing
texture / cooking
3. Fill in the chart
Examples of Physical Changes / Examples of Chemical ChangesPainted cloth becomes red / Cooking hamburger turns brown
Cutting a piece of paper / Rusting tools become reddish brown
Molding clay / Ripening apples turn red
Mixing lemonade / Burning wood for a campfire
4. Freezing is the process by which a substance changes from its liquid state into its solid state.
An example of freezing other than water to ice is melted wax become solid.
An example of evaporation is grass wet with dew slowly dries in the morning sunshine
6. Cookies baked in the oven are an example of a chemical change.
7. How is energy transferred when a wave moves through an ocean? Energy is transferred across great distances while individual areas move primarily up and down.
8. In a longitudinal wave, energy travels in the in the same direction as the disturbance.
9. Sound waves, water waves, and the waves made by a rope are all examples ofmechanical waves.
10. A mechanical wave is caused byforces creating a disturbance in a medium
11. Amplitude is the distance between a crest or trough of a wave and line through the center of a wave.
Frequency is the number of waves that pass a fixed point in a given amount of time.
Wavelength is the distance from one wave crest to the next crest.
12. Jordan placed a straw into a cup of water. When he looked at the straw, it appeared to be broken at the
point where the straw entered the water. This was caused by refraction of light waves passing from air into water.
13. Reflection is the bouncing back of a wave after it strikes a barrier.
14. An example of diffraction is water waves move around a ship in the ocean.
15. When you measure the number of wave crests reaching the shore in a given time, you are measuring the
frequency of the waves.
16. An echo is an example of sound waves being reflected
17. A sound wave is an example of alongitudinal wave.
18. A transverse wave transfers energy in the perpendicular direction of its disturbance.
19. An electromagnetic wave is caused by a disturbance ina field
20. The sun produces the most EM waves on Earth.
21. Radiation is theenergy that moves as EM waves
22. Bioluminescent animals produce light throughchemical reactions
23. When microwaves encounter water, theyconvert electromagnetic energy into heat.
24. electromagnetic waves can transfer energy through empty space.
25. If you shine a green light on white paper why does the paper appear to be green? The white paper reflects all the wavelengths of light that are shining on it.
26. A lime appears green because the lime reflects green light and absorbs all of the other colors.
27. The primary pigments create colors through subtractive mixing.
28. A polarizing filter lets through only light waves that vibrate in a particular direction.
29. The production of light through high heat is called incandescence
30. Which EM waves have the highest frequencies?Gamma waves
31. Fluorescence is when a material absorbs electromagnetic radiation of one wavelength and gives off electromagnetic radiation of a different wavelength.
32. Cell phones and radar are example of microwaves
33. These EM waves have the highest energy.Gamma waves
34. EM waves with frequencies of 1012 Hz or less are considered this type of wave.Radio waves
35. This type of EM wave is frequently associated with heat.Infrared waves
36. The smallest part of the EM spectrum is made up of this type of wave.Visible light
37. Waves from the Sun in this part of the EM spectrum can burn your skin.Ultraviolet rays
38. These EM waves pass through soft tissue but are absorbed by bone.X-rays
39. EM waves from this part of the spectrum are used in radar and cell phones.microwaves