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Unit 1 Properties of Matter - Review Quiz (7.6A, 7.6B, 7.6C, 7.6D, 7.6E)
Quiz by Grade 7 Science - Texas Education Agency
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The chemical formula for acetic acid is CH₃COOH.
How many hydrogen atoms are in one molecule of acetic acid?
Which statement is an accurate comparison of the formula for ammonia (NH₃) and the formula for sodium hydroxide (NaOH)?
The chemical formula for methane is CH₄.
Which statement describes the atoms present in FOUR molecules of methane?
The names and chemical formulas of four substances are shown in the chart.
Which substance listed in the chart is made up of the most atoms?
A student places ice cubes into a beaker filled with warm water. Which statement BEST identifies and explains the change that will occur to the ice cubes?
A teacher performs these steps for a class demonstration, and students record their observations.
1. Put a small candle in a candleholder.
2. Light a match.
3. Use the flame from the match to light the candle.
4. Let the candle burn for 5 minutes.
5. Blow out the flame.
6. Let the students examine the candle after it has cooled.
Which statement correctly identifies a physical change and a chemical change that occurred during the demonstration?
Matter can undergo physical or chemical changes. Which of these are examples of physical changes?
Select TWO correct answers.
Students create a table that lists processes observed in nature.
Which process describes only a physical change?
Researchers are investigating processes that happen during digestion. Which answer choice describes only a physical change during digestion?
Which statement correctly compares atoms and molecules?
Which statement about chemical symbols is correct?
Which is an example of a molecule that is also an element?
Which formula represents a compound?
Why are chemical formulas important?
Two salt solutions are made: Solution A with 30 g salt in 200 mL water, Solution B with 15 g salt in 200 mL water. Which is more concentrated?
Which best describes a solvent?
Which of these is an aqueous solution?
Why does increasing temperature usually speed up the rate of dissolving?
Which situation shows the effect of agitation on dissolving?
