Science G4 Summary - Semester 1 (Updated)

Matter is anything that takes up space and has mass. Science is s search for the laws of nature and for ways to use them for the benefit of mankind. Scientist is the name of a person who spends his/her time trying to learn about the things God made. Four way how do scientist learn: 1. They observe; 2. Gather information and try to think clearly; 3. They try to make sensible guesses, or hypotheses; 4. They test their hypothesis with experiments to see whether they are correct. Observation means looking carefully at something

Vertebrate is animals with backbones. Invertebrate is animals without backbones. Exoskeleton is the external skeleton. When an insect outgrows its exoskeleton and grows a new exoskeleton under the old one and crawls out of the old skeleton called moulting. All the 3 body part of insect: head, thorax, and abdomen. Scientist call a caterpillar is larva. Some other differences between butterflies and moths: Moths have a stout body, while butterflies have a slender body. A metamorphosis is a change in form. Four stages of complete metamorphosis start from egg, larvae, pupa, adult. The state of law of biogenesis is life can only come from other life.

Hypothesis is a reasonable or sensible explanation of something based on observation of that thing. Experiment is a planned way to test a hypothesis. Camouflage is a disguise that causes people or animals to blend in with their surroundings. When a harmless animal looks like a harmful one it's called mimicry. 5 way that insects communicate: sight, smell, touch, dancing, sound. Photosynthesis is the process by which green plants use the energy of sunlight to change water and carbon dioxide into sugars to make food. 

Chlorophyll is the green coloring matter that green plants use to manufacture their own food. The part of the flower are: petal, sepal, stamen, and  pistil. The 3 main part of a seed are: embryo, seed coat and stored food (cotyledon). Three things must seed have in order to germinate are: water, oxygen, and the right temperature. The life-saving antibiotic is produced from a green mold-penicillin. The poison found in tobacco plant is nicotine

To move from one place to another with the change of seasons called migrate. The bird's voice box called syrinx. (Final result experiment picture, a simple paper rocket project). in order to fly high, you must use rubber band.