How can energy change during a chemical reaction?

a. transfer of heat and/or work

b. increase in heat and/or destruction of matter

c. change in the mass of the reactants or thermal energy

d. increase or decrease in total energy of a system?

State any 2 effects of a force on the motion of a body

List some exothermic and endothermic processes

Biology and geology are two very different sciences, but biologists and geologists use scientific knowledge in the same way. These scientists both use scientific knowledge to a. answer questions and solve problems affecting the natural world. b.

What element has 7 neutrons, 7 protons and 7 electrons?

A temperature of 200°F is equivalent to approximately a. 37.8°C. b. 232°C. c. 93.3°C. d. 840°C.

The nearest large galaxy to our own is about 2.5 million light-years away. how many meters is that

An automobile travels on a straight road for 25 km at 32 km/h. it then continues in the same direction for another 25 km at 64 km/h.

Why is it important for engineers to design bumper cars safely

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.