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Fact Crossword 24

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Across
5.a _____ ______ is a unit of length equal to the distance light travels in one year. This is a distance of about 9.5 trillion kilometers per year (Fact 136)
7._________ are organic compounds made of living things (Fact 301)
12.One astronomical unit is equal to the average distance between the Earth and the ______; it is a distance of approximately 150, 000,000 kilometers (Fact 133)
13.a _______ ______ is a force of attraction that holds two atoms together as a result of the rearrangement of electrons between them (Fact 276)
14.The _____ ______ ranges from 0 (very acidic) to 14 (very basic) (Fact 293)
15.a _________ force causes objects to move in a circle (Fact 119)
18.The largest mountain in the solar system, _______ _______ is found on Mars. It is nearly 3x as tall as Mount Everest (Fact 150)
23.the _______ _______ is used to measure distances in between the Earth and the sun (Fact 132)
24._______ is a force that is exerted when matter is pushed or squeezed (Fact 97)
25.Any substance that has a pH of 7 is _______ meaning that it is neither acidic or basic (Fact 294)
27.the _______ ______ of an element is the weighted average of all of the isotopes of that element (Fact 253)
29.a ______tastes bitter, feels slippery, conducts electricity, and has a pH of greater than 7 (Fact 290)
30.Hot stars are _______, cold stars are red (Fact 178)
31.protons are positively charged, _______ have no charge, and electrons have a negative charge (Fact 242)
34.an ________ is a substance that changes color in the presence of an acid or a base (Fact 291)
35.A chemical reaction in which energy is released is called _________ (Fact 288)
37.________ is the tendency of all objects to resist a change in motion (Fact 123)
38.All of the inner planets are small and _______ and have rocky surfaces (Fact 140)
Down
1.the magnitude of air resistance acting on an object depends on the ______, shape, and speed of the object (Fact 115)
2.acids turn blue ____ ____ red and bases turn red ___ ____ blue(Facts 292 and 293)
3._________ is a force that is exerted when matter is pulled or stretched (Fact 96)
4.proton
6.the formula to calculate _____ is speed x time (Fact 78)
8.______ _____ is a force that opposes the motion of objects through air (Fact 114)
9.density, mass, volume, solubility, malleability and ductility are examples of ______ properties of matter (Fact 205)
10._______ is a substance's resistance to flowing. It depends on the size and shape of the particles and the attractions between them (Fact 222)
11.All forces have ___________ and magnitude(size) (Fact 88)
16.The four inner or _______ planets are Mercury, Venus, Earth and Mars (Fact 138)
17._______ _______ is the force acting on the surface of a liquid that causes the liquid that causes the liquid to form spherical drops (Fact 211)
19._______, reactivity with oxygen,reactivity with an acid, reactivity with a base, reactivity with oxygen are examples of chemical properties (
20.A chemical reaction in which energy is being absorbed is called _______ (Fact 287)
21.elements in the same _______ or family on the Periodic Table have similar properties (Fact 271)
22._______ are atoms from a particular element that have the same number of protons but a different number of neutrons (Fact 252)
26.___________ is the fourth planet from the sun, is known as the Red Planet, has a lot of volcanic activity, and has two moons (Fact 149)
28._______ is a force that opposes the motion between two surfaces (Fact 100)
32.the formula to calculate _______ is distance divided by speed (Fact 79)
33.________ is the second planet from the sun and is the planet most similar to Earth in size, shape and density (Fact 142)
36.An ______ reacts with metals, tastes sour, conducts electricity , can destroy body tissue and has a pH of less than 7 (Fact 289)

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