Biology
Smallest unit of life
A cell
Difference between compounds and mixtures
Coumpound - made of two or more elements chemically combined
Mixture- made of substances physically mixed
Flows in a wire to light a bulb
eclectrical current
This layer is where the weather occurs
the troposphere
Which one is smaller bacteria or virus?
virus (20~300 nanometers)
What is chemical reaction
Reaction that makes new substances
Echo is
Reflection of sound
What causes earthquake, volcano, tsunami, mountain formation
Tectonic plates that move
Aminal that make their own food
producers
how particles are arranged in solids, liquids and gases
solid- tightly packed in a fixed shape
liquid- close together but can slide past each other
gas- far apart and spread out
What make us to stay on Earth and not fly away?
Gravity force
This is contains a high level of the ozone
Stratosphere
Difference between animal and plant cells?
Plant cells: have cell wall, chloroplasts, and a large vacuole.
Animal cells: no cell wall, no chloroplasts, small vacuoles.
What is the pH scale. Its range?
The pH scale is a tool used to measure how acidic or basic (alkaline) a water-based solution is. Range if 0–14
Force acting opposite to an object's motion through the air and preventing it movement
air resistance
Tell me about layers of Earth
The Earth has four main layers: the crust (outer solid layer), the mantle (hot, semi-solid layer), the outer core (liquid metal), and the inner core (solid metal at the center).
Funtions of these organs?
heart
lungs
stomach
kidneys
liver
Heart: pumps blood
Lungs: take in oxygen, remove carbon dioxide
Stomach: digests food
Kidneys: filter waste from blood
Liver: produces bile to help digest fats and removes toxins from the blood.
Magnesium(grey metal) + Oxygen (gas) ->
Magnesium Oxide (white powder)
Electric current flows only when …
circuit is complete
Explain water cycle
The water cycle is the continuous movement of water on Earth, where water evaporates from oceanss, forms clouds by condensation, falls as precipitation, and returns to rivers, lakes, and the ground.