Do you need to list everyday household objects such as scissors and x-acto knives in your science fair materials/methods?

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

This drawing shows a human body system. what is the primary function of this body system?

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?