Mock STAAR Practice

Why is plastic wrapped around the metal wires? 

• Plastic is a good insulator
• Plastic is a good conductor
• Plastic does not melt
• Plastic will overheat and melt

Which arrow best represents how Earth completes a day/night cycle? 

• Arrow 1
• Arrow 2
• Arrow 3
• Arrow 4

This diagram correctly demonstrates how light ...

• can bounce (reflect) off of shiny surfaces like a mirror
• can refract (bend) off of shiny surfaces like a mirror
• travels in angles but also straight lines 

What two items are missing from this Food Web? 

• Energy (the sun) and Producers (plants)
• Producers (plants) and Predators
• the Sun (energy) and Decomposers
• The sun is the only thing missing

All of the following are inherited (born with) traits EXCEPT...

• Brown fur on a bear
• Dolphin swimming
• Green leaves on a tree
• Monkey using a fork to eat

Where should the wires be cut if all the lights need to be turned off?

• Don't cut any of the wires
• Cut one of the wires by the light bulb
• Cut one of the wires that is connected to the battery

This image represents how rain can cause EROSION. What is Erosion? 

• Sediments moving, transporting or being carried away
• Sediments building up to form new land
• Rocks and land breaking apart due to water or freezing temperatures

All of the choices demonstrate how birds interact with NON-living things in their environment, EXCEPT...

• A bird drinking water from a puddle
• A bird flying around in the air
• A bird using dead twigs to build a nest
• A bird getting worms to eat

Which of the choices below demonstrate Mechanical Energy being used? 

• Fruit falling from a tree
• A shark swimming 
• A boat floating 
• All of the above

A student dropped a kool aid tablet in water to watch it dissolve. Later the student put the solution outside in the hot sun for a few days. What most likely happened?

• All of the kool aid evaporated and left nothing behind
• All/most of the water evaporated, leaving behind the powder
• Only half of the water evaporated
• Nothing happened, the kool aid stayed the same