OATmeal # 6
- Highways allow people to travel between towns and cities. These highways also divide ecosystems into smaller pieces. Animals can become separated from lakes they use for breeding. For example, tiger salamanders travel long distances to breed at lakes.
How could highway systems affect animals such as the tiger salamander?
A. Tiger salamander habitats may be exposed to less pollution.
B. Tiger salamanders may be cut off from important resources.
C. Tiger salamanders could improve their ability to remember roads.
D. Tiger salamander habitats within ecosystems could become larger.
- Which of the following is a physical change?
- digesting an apple
- boiling water
- burning newspaper
- baking bread
- The molecules in an object or a substance are always in motion. This kinetic energy can be measured and varies from substance to substance. Which of the following would have the highest average kinetic energy?
A. room temperature tap water
B. an ice cube
C. a cup of warm soup
D. a pot of boiling water
- A forest suddenly loses all of its decomposers. Explain two effects this loss will have on the ecosystem. Write your answer in the Answer Document. (2 points)
- Coal is usually found underground, compressed in a layer between other types of rock.
Coal is produced by what rock-forming process?
A. crystallization from melted rock
B. formation of sediment from weathering
C. deposition and burial of dead plant matter
D. eruption of volcanic ash followed by settling in a layer
- Waves consist of many crests and troughs, but may be different in size and spacing. If a wave has higher crests, which of the following will be larger?
A. wavelength
B. frequency
C. amplitude
- peak
- Photosynthesis is a chemical process in which water and carbon dioxide react in the presence of sunlight to produce food for a plant. Which of the following is are the products of photosynthesis?
A. water, sunlight, and carbon dioxide
B. water, oxygen, and carbon dioxide
C. glucose, oxygen, and water
D. glucose, sunlight, and water
- Students do an investigation on the reaction of baking soda with vinegar. They create a data table to record the mass (grams) and temperature (degrees Celsius) of the mixture every 5 seconds. Several pieces of data are missing from the table.
In your Answer Document, give one example of how the incomplete data make it difficult for the students to draw conclusions about the changes that occur when baking soda reacts with vinegar.
Explain how the incomplete data will affect the ability of other students to reproduce the experiment. (2 points)
OATmeal #6