Science Quiz

Which unit of measurement is used to determine the length of an object?

• A. Liter升

• B. Meter米

• C. Gram克

• D. Cubic centimeter立方厘米

Kate conducted an experiment and recorded information about the color, temperature, and mass of the substances she is working with. What type of properties did Kate record?

• A. Chemical化学性质

• B. Extensive广延性质

• C. Intensive强度性质

• D. Physical物理性质

The unit of distance known as a light-year is equal to 9,500,000,000,000 kilometers. How would this distance be written in scientific notation?

• A. 95 x 10^10 km

• B. 95 x 10^11 km

• C. 9.5 x 10^11 km

• D. 9.5 x 10^12 km

If the amount of sleep a student gets is related to the student’s test grades, then students getting at least 7 hours of sleep will receive better test grades than those who get less than 7 hours. This statement is an example of which of the following?

• A. Data数据

• B. An analysis分析

• C. A law法则

• D. A hypothesis假设

What term describes the amount of push or pull on an object?

• A. Force力

• B. Power功率

• C. Pressure压强

• D. Energy能量

A lifeguard measures the water temperature of an indoor pool and determines that it is at a safe, standard level. Which of the following is most likely the temperature of the water?

• A. 10°C

• B. 98°C

• C. 84°F

• D. 202°F

How is CO2 classified?

• A. As a compound一种化合物

• B. As an allotrope一种同素异形体

• C. As a noble gas一种惰性气体

• D. As a homogeneous mixture一种均匀混合物

What elements make up CO2?

• A. Calcium and oxygen钙和氧

• B. Calcium and oxidane钙和氧烷

• C. Carbon and oxygen碳和氧

• D. Carbon and oxidane碳和氧烷

Which of the following is a physical property of CO2?

• A. It has a low toxicity CO2的毒性很低

• B. It is a colorless gas CO2是一种无色气体

• C. It is formed during combustion reactions 它是在氧化反应中形成的

• D. It is used by plants during photosynthesis 植物进行光合作用时需要CO2

Which of the following is true of CO2?

• A. It can be dissolved in water CO2可溶于水

• B. It cannot be dissolved in water CO2不溶于水

• C. It becomes solid in water CO2在水中变成固体

• D. It changes from solid to liquid in water CO2在水中从固体变成液体