Twins in Space Voc Practice

​ (a)   Scott and Mark Kelly became the subjects of an interesting study. As ​ (b)   twins share the same ​ (c)   , this was a unique opportunity to make ​ (d)   between two bodies and discover how space traveling affects humans. Scientists expect to see changes in telomeres due to the ​ (e)   environment in space. What do you think?

• Twins
• identical
• DNA
• comparisons
• stressful

Match the following pictures to the correct word.

• envious

• 
• shuttles

• 
• exposure

• 
• flu

• 
• treadmill

• 

After using my shoes for a long time they ​ (a)   .

• wore out
• collided
• teased

Oh! You ​ (a)   me! How long have you been standing there?!

• startled
• spotted
• aged

As we ​ (a)   , our appearance changes: we get gray hair, skin sags or wrinkles appear.

• age
• startle
• research

In space, Scott had to ​ (a)   his belongings, or they would float.

• strap
• zap
• duplicate

When my little brother was born, I felt ................ because she got attention.

Siblings .............. each other constantly, but it's normal.

..................... are 'x' shaped structures that have DNA and genetic information.

Scott organized his things in different .............. and strapped them.