7th Grade Pre-Post Test Science

What weather conditions can she expect for the afternoon and evening? Question 1 A student observing the sky notices that the cirrostratus clouds she saw in the morning have been replaced by cumulonimbus clouds in the afternoon. What weather conditions can she expect for the afternoon and evening? A. low clouds and fog with little temperature change B. fair skies continuing with scattered puffy clouds C. light rain, then an increase in temperature and clearing skies D. heavy wind and rain followed by a drop in temperature and clearing skies

Question 2

3. Which sequence correctly shows the order from simplest to most complex in multicellular organisms?

4. The primary source of energy for most living things is A. Plants. C 4. The primary source of energy for most living things is A. Plants C. Food B. Sun D. AMP’s

5. What is the relationship between tissues and organs. A 5. What is the relationship between tissues and organs? A. Organs are made from one type of tissue. B. Tissues are made from one type of organ. C. Tissues are made from different types of organs. D. Organs are made from different types of tissues.

6. In a multicellular organism such as a fish, which of these items is composed of all the others?   A. Tissues C. Cell structures B. Organs D. Organ systems

7. This cellular process converts light energy from the sun into chemical energy that organisms use for life functions.   Respiration, in which oxygen is used and carbon dioxide is given off. Fermentation, in which sugar is broken down and alcohol is given off. Digestion, in which starch is broken down into simple sugars. Photosynthesis, in which carbon dioxide is used and sugars are produced.

8. These two plant cell structures are responsible for storing energy from sunlight and later releasing it for cells to use.   Chloroplast and nucleus B. Mitochondrion and cell wall C. Chloroplast and mitochondria D. Nucleus and cell wall

9. Which cell structure carries out a function for a cell that is similar to the function that bark carries out for a tree?   A. Cell Wall B. Nucleus C. Chloroplast D. Mitochondrion

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Properties of Some Substances – Use this chart for question 15  A scientist measures out 15 mL each of baking soda, salt, sugar, iron filings, and corn starch. She runs a series of procedures and records her results in the table below. The first column in the table indicates the procedure. The remaining columns indicate her results for each substance.

Question 15 According to the information in the table, what comparison can the scientist make about the densities of sugar and corn starch? A. Sugar is more dense than corn starch. B. Corn starch is more dense than sugar. C. Sugar and corn starch have the same density. D. Both sugar and cornstarch are more dense than salt.

The moon orbits the Earth about every A. 28 days B. 31 days C. 24 days Question 16 The moon orbits the Earth about every A. 28 days B. 31 days C. 24 days D. 60 days

Use the water cycle diagram to answer questions 17-18

Question 17 What evidence suggests that water goes through a physical change when it evaporates in the water cycle? A. The density of the water remains the same. B. The volume of the water remains the same. C. The physical properties of the water remain the same. D. The chemical properties of the water remain the same.

Question 18 The diagram includes an ocean in the water cycle. How does salt water from the ocean end up as fresh water in precipitation? A. Runoff leaves salt in the soil. B. Precipitation leaves salt in the clouds. C. Evaporation leaves salt in the ocean. D. Condensation leaves salt in the water vapor.

Question 19 What is the primary energy source that drives Earth’s water cycle between the atmosphere, oceans and land? A. wind B. sunlight C. ocean currents D. rotation of Earth

Question 20 Water gains energy during evaporation. During what process in the water cycle is this energy released? A. percolation through soil B. transpiration from plants C. runoff into the lake and ocean D. condensation that forms clouds

Question 21 The range of an acid on the pH scale is A. 0-6 C. 7 B. 8-14 D. 15 and above

Question 22

Questions 23-24 Baking Soda and Vinegar Reaction   Students perform a chemistry experiment by mixing baking soda with vinegar. They mix 4 grams of baking soda with 50 grams of vinegar in a 6-gram plastic cup as shown below. The cup is left uncovered. The students record the mass and temperature of the mixture every 5 seconds. They continue these observations until 10 seconds after they see the mixture stop bubbling. Their data are shown in the table below.

Question 23

Question 24 The data in the table show the temperature of the cup-baking soda-vinegar system. The temperature of the surrounding air was not measured. Assuming that the total amount of energy remains constant, what conclusion about energy transfer does the temperature data support?   A. Thermal energy was lost from the surrounding air and the system. B. Thermal energy was gained by the system and the surrounding air. C. Thermal energy was transferred from the surrounding air to the system. D. Thermal energy was transferred from the system to the surrounding air.

Question 25 The diagrams show the sun, Earth and moon in different positions relative to one another. Which diagram shows the correct arrangement of the sun (S), Earth (E) and moon (M) relative to the location of high tides? A B C D

Question 26