The energy of the universe is zero and the mass of the earth is also zero. True or false and why. please I need help​

Which type of reaction always has an element and a compound as reactants

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!