Which of the following is an observation and not an inference? a. a cup with steam coming from it will be hot to the touch. b. dark clouds in the sky will mean rain later in the afternoon. c. bubbles form when two chemicals are mixed together. d. a plastic bag moving along the ground is being pushed by the wind.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

hope this

tobey

the answer would be d