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WorksheetsScience ACP 7th
Total questions: 200
Worksheet time: 2hrs 40mins
1. Groups of cells that work together to do a specific job are called (a) .
6. Chemical digestion uses special proteins called (a) to break up large food molecules into smaller molecules.
7. The liver produces bile, a liquid that is stored in the (a) .
8. The tiny filters in the kidneys that collect liquid waste and form urine are called (a) .
10. The large curved muscle just below the rib cage that moves up and down causing breathing is the (a) .
14. The chemical messengers produced by the endocrine system are called (a) .
16. During sexual reproduction, a cell produced in the male testes is called a (a) .
19. The monthly release of an egg cell from the ovaries is called (a) .
21. All organisms have unique structures suited to their way of life, but share some features in (a) .
23. The gel-like fluid that takes up most of the space inside the cell membrane is the (a) .
26. The "powerhouses" of the cell, which use oxygen to transform the energy in food, are the (a) .
28. The process by which plants use sunlight to produce sugar for food is called (a) .
31. Cellular respiration combines oxygen with food molecules (sugar) to release (a) .
34. The main component of the plant cell wall that provides extra support is (a) .
35. The cell membrane encloses the cell and acts like a (a) , allowing some materials to pass through it, but not others.
36. Chromosomes, the genetic structures carrying cell activity information, are made of (a) .
38. The stage before cell division starts, where the cell prepares to divide and copies its chromosomes, is called (a) .
42. The Swedish biologist who developed the first modern classification hierarchy was Carolus (a) .
46. Fungi cell walls are made up of a material called (a) .
48. The scientific name of an organism consists of its genus and (a) .
51. Organisms made up of cells whose internal structures are enclosed by membranes (like a nucleus) are known as (a) .
53. When classifying plants, scientists often use the term (a) instead of phylum.
57. A special key that helps identify organisms by presenting a series of choices is a (a) key.
61. All the organisms that live in an area together with the nonliving factors of the environment define a(n) (a) .
63. Factors that limit how many organisms can live in an environment are called (a) .
67. Organisms that make their own food and form the base of the food chain are called (a) .
70. A food web is a system of several overlapping food (a) .
73. The two important forms of matter that cycle through an ecosystem in the carbon dioxide-oxygen cycle are carbon dioxide and (a) .
76. A large region characterized by a distinct climate and specific types of plant and animal life is a(n) (a) .
77. In the tundra biome, the soil that remains frozen throughout most of the year is called (a) .
82. The chemical process where oxygen is combined with food (glucose) to release energy is called cellular (a) .
84. The change in shape and appearance that occurs during the life cycle of butterflies and moths is called complete (a) .
87. A segment of DNA that carries instructions for the traits of an organism is called a(n) (a) .
91. The seasonal movement of animals from one place to another is called (a) .
94. Random changes in genes are called (a) .
97. The theory of (a) describes the slow change in organisms that occurs over many generations.
99. Sucking to get milk is an example of a(n) (a) behavior in young mammals, meaning it is encoded in their genes.
102. Petroleum, coal, and natural gas are nonrenewable resources because they are formed from (a) .
105. Devices that use the energy of sunlight to generate electrical energy are called (a) (PV) cells.
108. The continuous movement of water between Earth's surface and the troposphere is the water cycle, also known as the (a) cycle.
110. Using fewer resources helps reduce the amount of waste that ends up in (a) .
112. Taking unwanted items and turning them into something new of greater value is described by the term (a) .
114. Substances that can damage living things, often created during industrial processes, are called (a) wastes.
117. The trapping of heat in the atmosphere by greenhouse gases is known as the (a) effect.
122. When the net force on an object is zero, the forces are said to be (a) .
125. Newton's Second Law of Motion is represented by the formula F=m×a, where 'a' stands for (a) .
127. For every action force, there is an equal but opposite (a) force (Newton's Third Law).
130. The force that causes objects to move in a circular path is called (a) force.
132. Work is measured in newton-meters, commonly called (a) .
137. A wheel and axle consists of a wheel and a shaft called the (a) .
140. The output force (Fout) divided by the input force (Fin) equals the mechanical (a) .
142. The hot, soft layer of movable rock below the Earth's solid crust is the (a) .
145. The ring-shaped belt of volcano and earthquake activity surrounding the Pacific Ocean is the (a) .
147. The strength of an earthquake, based on the seismic wave energy released, is its (a) .
149. The process of breaking rocks up into smaller pieces is called (a) .
152. The process of taking away land material and carrying sediment away is (a) .
154. A divide separates two adjacent (a) .
156. The age of an object based on its comparison to the ages of surrounding objects is (a) age dating.
161. The world's oceans cover almost (a) percent of Earth's surface.
163. The effect of Earth's rotation on the path of winds and ocean currents is the (a) effect.
166. Deep-sea trenches form at convergent plate boundaries where ocean crust undergoes (a) .
169. Nitrogen makes up 78% of Earth's (a) .
171. The protective ozone layer is located in the (a) .
174. Lines connecting areas of the same air pressure on weather maps are called (a) .
176. A psychrometer is made up of a wet-bulb thermometer and a(n) (a) thermometer.
180. Unusual warming of ocean water off the coast of Peru that affects weather every few years is known as (a) .
184. The part of the brain that helps with balance and coordination is the (a) .
188. Red blood cells are specialized to carry oxygen and (a) .
190. The energy source that uses thermal energy from Earth, often involving heated water and steam, is (a) energy.
193. The organic substances in soil that come from decaying animals and plants are called (a) .
196. Animals that feed on both producers (plants) and consumers (other animals) are classified as (a) .
199. The tendency of an object to resist a change in motion is known as (a) .
