4th Science SC Ready

The snowshoe hare pictured below lives in cold regions.  In the summer months, the snowshoe hare has brown fur.  The snowshoe hare's fur changes to white during the winter months. Which of the following best explains how the ability to change color helps the snowshoe hare?

• Brown fur keeps it cool in summer. White fur keeps it warm in winter.
• Brown fur helps it hide in summer. White fur helps it hide in winter.
• Brown fur helps it run fast in summer. White fur helps it run fast in winter.
• Brown fur helps it find food in summer. White fur helps it find food in winter.

A student is creating a model for the life cycle of a frog.  Which of the following is the correct order for her to use?

• tadpole, egg, adult frog and froglet (immature frog)
• egg, tadpole, adult frog and froglet
• egg, tadpole, froglet, and adult frog
• egg, froglet, tadpole, adult frog

Below is a picture of cacti, plants that live in dry desert areas. Which of the following claims is the most likely reason cacti have thick stems?

• to store water
• to protect from predators
• to provide food for birds
• to provide seed for the cacti

Which of the following best explains why plants developed colorful flowers that smell good?

• to attract pollinators
• to provide food for insects
• to protect from predators
• to provide food for birds and animals 

The diagram below shows the stages of growth of a plant.Which one best shows a mature plant?

• A
• B
• C
• D

Which of the following best explains why days are 24 hours long?

• It takes 24 hours for Earth to rotate on its axis.
• It takes 24 hours for the sun to revolve around Earth.
• It takes 24 hours for the moon to rotate around Earth.
• It takes 24 hours for Earth to revolve around the moon.

Below is a model of the water cycle. What type of energy powers the process shown by the letter "D" in the model?

• heat energy from the sun
• energy from gravity
• energy from the waves
• heat energy from evaporation

A class used the setup below to model the water cycle.  Water droplets formed on the bottom of the glass cover. How did the water droplets most likely form on the bottom of the glass cover?

• Water vapor condensed on the glass.
• The ice cubes melted and wet the glass.
• The drops of water precipitated onto the glass.
• Runoff from the water wet the glass.

The data table below shows the temperature today and the average temperature for this time of year for different cities.  It also shows the difference in those temperatures. In which city is today's temperature the most above average?

• New York
• San Francisco
• Columbia
• Miami

On Monday, students made predictions on how temperatures would compare at different times of day.  The graph below shows the data they collected to test their predictions. Which prediction below is correct according to the data?

• The temperature at will be higher at 12:00 P.M. than 2:00 P.M.
• The temperature at will be higher at 10:00 A.M. than 4:00 P.M.
• The temperature at will be higher at 2:00 P.M. than 6:00 P.M.
• The temperature at will be higher at 6:00 P.M. than 4:00 P.M.