1.which of the following is true about all mixtures? a). mixtures consist of two or more substances chemically combined. b). mixtures cannot be separated by physical means. c). mixtures consist of only one kind of atom. d). mixtures have two or more substance mixed together, but are not chemically combined. 2.the substances in a(n) mixtures are usually easily seen and separated. a). homogeneous b). heterogeneous c). uniform d). uncontaminated

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

How does a hydroelectric power plant converts energy into energy.

How have the greenhouse gasses increased from the year 2000 to 2018