Matter
What is the difference between a mixture & a solution?
A mixture can be separated easily but a solution is evenly mixed and harder to separate.
What Force pulls objects toward the Earth?
What is the organizational structure of multicellular organisms?
cells - tissues - organs - organ systems - organisms
What is a consumer in a food chain?
An organism that eats other organisms
A falling barometer read is associated with what type of weather
low pressure, rainy & cloudy weather
Which of these is a chemical change: melting ice, tearing paper or burning wood?
Burning wood
A ball is rolling on the ground and slowly stops. What force caused it to stop?
Friction
What is the job of the digestive system?
Break down food and absorb nutrients.
How do plants get their energy?
Plants get their energy from the sun through photosynthesis
What kind of air pressure and wind speeds are associated with hurricanes?
lower pressure, higher wind speed
How can you keep items cool when bringing a cold lunch to school?
Use an insulator that reduces the amount of heat loss or transfer
If two kids push a box with equal force in opposite directions. What will happen?
The box will not move because the forces are balanced
How does the circulatory system and digestive system work together?
The digestive system breaks down food into nutrients and the circulatory system transports the nutrients to the cells
What would happen if all the predators were removed from an ecosystem?
The prey population would increase
How do Ocean currents impact weather on land?
Ocean currents such as the Gulf Stream help regulate global climate, warmer Ocean temperatures which lead to more moisture in the atmosphere. It helps moderate weather on the coast.
What would happen to the weight of a drink if you dissolved 30 grams of sugar into a glass of unsweetened tea that originally weighed 100 grams? Would it weigh more or less? How much would it weigh?
What do you predict would happen if we changed the mass of the object?
more mass = more friction, more mass = more force needed to change the motion of the object
What are examples of inherited vs acquired traits?
inherited - eye color, handiness, petal shape and color, hair color
acquired - language, piercing, tattoos, scars
What is the role of the decomposers in an ecosystem?
They break down dead organisms and return nutrients to the soil
Why do wet clothes hanging on a clothesline dry on a hot summer day? Why would they dry slowly on a cold day?
- Water evaporates
- It takes longer for the water particles to get enough energy to evaporate
How can you tell if a chemical reaction has occurred?
A change in color, gas production, temperature change or form of new substance
Explain a scenario when you would want to decrease or increase friction.
Ex: Polished surface for bowling, tread on shoes when playing basketball
How are the nervous system and skeletal system different?
The nervous system sends messages to the brain and the skeletal system protects the brain and other organs.
what would happen in this food chain if the number of grasshoppers increased? Why?
Grass - Grasshopper - Snake - Hawk
The amount of grass would decrease because there would be more consumers that consume grass. If the grasshoppers increased then the snakes and hawks would increase because there would be more food for them.
How does the amount of sunlight over a body of water affect evaporation?
More energy more evaporation