Answers: 1
Biology, 21.06.2019 16:00
Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesnβt break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water youβd break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove
Answers: 2
Biology, 21.06.2019 18:50
Of the pollutants that form acids in the atmosphere, which is easiest to reduce? a. sulfur dioxide b. nitrogen dioxide c. ozone d. carbon monoxide
Answers: 3
Biology, 22.06.2019 02:00
Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat
Answers: 2
Biology, 22.06.2019 03:00
Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils
Answers: 2
Heya! What you all doing?β...
Arts, 01.04.2020 17:40
Mathematics, 01.04.2020 17:41
Social Studies, 01.04.2020 17:41
Mathematics, 01.04.2020 17:41
Mathematics, 01.04.2020 17:41
Mathematics, 01.04.2020 17:41
Computers and Technology, 01.04.2020 17:41
Mathematics, 01.04.2020 17:41
Mathematics, 01.04.2020 17:41
Mathematics, 01.04.2020 17:41